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Question 1040044: A dealer altered his discount from 25 to 20 percent . By what percent was the selling price altered.
Click here to see answer by Theo(13342)

Question 1040062: please help me solve the following equations :
Solve the following equation and leave your answer in surd form.x^2+3 (2x+1 )=0
Click here to see answer by Boreal(15235)

Question 1040071: . Find the present worth of a future payment of P100,000 to be made in 10 years with an interest of 12% compounded quarterly.
Click here to see answer by addingup(3677)

Question 1040071: . Find the present worth of a future payment of P100,000 to be made in 10 years with an interest of 12% compounded quarterly.
Click here to see answer by MathTherapy(10552)

Question 1040087: A scientist determined that the bones from a mastodon had lost 70.2% of their carbon-14.How old were the bones at the time they were discovered?
Click here to see answer by ikleyn(52781)

Question 1040073: I need help with this one,
Thanks,

Insurance I. Suppose a company charges an annual premium of $500 for a fire insurance policy. In case of a fire claim, the company will pay out an average of $100,000. Based on actuarial studies, it determines that the probability of a fire claim in a year is 0.004.
What is the expected annual profit of a fire insurance policy for the company?
(Fill in the blank below and give your answer as a whole number.)
The expected annual profit per policy is $.

What annual profit can the company expect if it issues 1000 policies?
(Fill in the blank below and give your answer as a whole number.)
The expected annual profit if it issues 1000 policies is $.

Click here to see answer by Boreal(15235)

Question 1040132: please help me to solve the following problem. m
Brian is 4 years older than Bob while Bob is 11 years older than Mark. If their combined age is 86 years, how old is Brian?
Click here to see answer by ankor@dixie-net.com(22740)

Question 1040120: A random sample of size 15 is selected from a normal population. The population standard deviation is unknown. Assume the null hypothesis indicates a two-tailed test and the researcher decided to use the 0.10 significance level. For what values of t will the null hypothesis not be rejected?
Click here to see answer by stanbon(75887)

Question 1040173: Factor completely and show a detailed solution
x^2a + 2x^a y^b + y^2b - 1

Click here to see answer by ikleyn(52781)

Question 1040180: Please help me solve the following questions.
Brian is 4 years older than Bob while Bob is 11 years older than Mark. If their combined age is 86 years, how old is Brian?
Click here to see answer by ikleyn(52781)

Question 1040172: A store mixes red fescue worth $10 per pound and chewings $14 per pound. The mixture is to sell for $13 per pound. Find how much of each should be used to make a 336-pound mixture.
How many pounds of the red fescue should be in the mixture?
Click here to see answer by ikleyn(52781)

Question 1040168: Joan Arlington has twice as much money invested at 5% simple annual interest as she does at 4%. If her yearly income from the two investments is $357, how much does she have at each rate?
Click here to see answer by josmiceli(19441)

Question 1040253: The next model of a sports car will cost
11.9%
more than the current model. The current model costs
$58,000
. How much will the price increase in dollars? What will be the price of the next model?
Click here to see answer by Aldorozos(172)

Question 1040167: Factor completely and show a detailed solution
x^2r+1 + xy + 3x^2r z^3r + 3z^3ry
Click here to see answer by Edwin McCravy(20055)

Question 1040167: Factor completely and show a detailed solution
x^2r+1 + xy + 3x^2r z^3r + 3z^3ry
Click here to see answer by AnlytcPhil(1806)

Question 1040308: If the national economy shrank to an annual rate of 9% per year for four consecutive years, then the economy shrank by 36% over the four-year period.
The economy actually shrank by ___% over the four-year period?
True or False.
Click here to see answer by stanbon(75887)

Question 1040350: How do I figure $40,530 less 5%?
Click here to see answer by ikleyn(52781)

Question 1040381: A bacteria has a doubling period of 4 days. If there are 2700 bacteria present now, how many will there be in 36 days?
First we must find the daily growth rate (Round this to four decimal places).
The growth rate is 0.189207.
Then we use this rate to answer the question.
There will be __________ bacteria
***I found the growth rate just need help with the second part***
Click here to see answer by ikleyn(52781)

Question 1040382: A particular pain relieving medicine has a decay rate of 16 % per hour. A patient was given a dose of the medicine 7 hours ago and there is currently 66 milligrams of the medicine in the patients bloodstream.
What was the original dose of the medicine? _________ milligrams
How long will the patient need to wait for there to be less than 25 % of the original dose of the medicine left in their bloodstream?
Express your answer as a decimal to the nearest tenth of an hour. _______hours
Click here to see answer by josmiceli(19441)

Question 1040384: Goods costing $18.16 at the beginning of the year 1957 cost $174.18 at the beginning of the year 2002. Find the average annual inflation rate over this time period. Express your answer the nearest thousandth of a percent.
Answer:_______ %
Click here to see answer by jorel555(1290)

Question 1040435: I'm having wrapping my head around this one and could use your guidance please!
Suppose $5,400 is invested in an account at an annual interest rate of 3.3% compounded continuously. How long (to the nearest tenth of a year) will it take the investment to double in size?
Any help is greatly appreciated!

Click here to see answer by jim_thompson5910(35256)

Question 1040383: Bacteria X has a growth rate of 160 % per hour. Some amount of bacteria X are accidentally introduced into some fruit salad. Two hours after contamination, there were 40,000 bacteria X in the fruit salad.
Find the initial number of bacteria X introduced into the fruit salad:
________bacteria
Estimate the number of bacteria in the food 3 hours after contamination.
________bacteria
Click here to see answer by ankor@dixie-net.com(22740)

Question 1040375: 1. The new vehicle license plates consist of 3 letters and 4 digits. From the letters in the English alphabet and the digits 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9, how many license plates can be formed if?
a. repetition of letters and digits is allowed?

Click here to see answer by solver91311(24713)

Question 1040553: If
1-3+4=100
4-6+9=999
2-6+7=879
Then
3-3+6=???
Click here to see answer by addingup(3677)

Question 1040599: If $700 is invested at 7% compounded quarterly, what is the interest earned after:
a) 2 years
Interest earned = $__________

b) 7 years
Interest earned = $__________
Click here to see answer by addingup(3677)

Question 1040603: Which of the following functions is shown in the graph linked below?
Graph: https://i.imgsafe.org/2ad1bf3125.png
A) y = 2 tan Θ
B) y = 2 cot Θ
C) y = 2 cot (Θ/2)
D) y = 2 tan (Θ/2)

Click here to see answer by Boreal(15235)

Question 1040598: Find the amount after 4 years if $800 is invested at 8% compounded:
a) Annually
Amount = $_________

b) Semiannually
Amount= $__________

c) Quarterly
Amount= $__________

d) Monthly
Amount= $___________
Click here to see answer by Boreal(15235)

Question 1040610: Do I use the z-score equation to solve this, if not, please show me the correct one and explain the steps to the solution.
Thanks,

28. It is known that in the absence of treatment, 72% of the patients with a certain illness will improve. The Central Limit Theorem tells us that the percentages of patients in groups of 500 that improve in the absence of treatment are approximately normally distributed. Find the percentage of patients (in groups of 500 patients) that have less than a 69% chance of improving in the absence of treatment. Use the percentile z-score table to assist you.
A) 97.72%
B) 6.68%
C) 2.28%
D) 93.92%

Click here to see answer by Boreal(15235)

Question 1040612: 1. 302 car stereos were recently sold in a car audio store. 149 had a CD player, 116 had a cassette player, and 40 had both a CD and a cassette player. How many had a CD player only?
2. 412 students were surveyed about their preferences of sports. 115 students like football, 100 students like baseball, and 45 students like both sports. How many students like exactly one of the two sports?
3. A campus radio station surveyed 500 students to determine the types of music they like. The survey revealed that 196 like rock,161 like country, and 113 like jazz. Moreover, 25 like rock and country, 17 like rock and jazz, 22 like country and jazz, and 6 like all three types of music. How many students surveyed liked rock only?

Click here to see answer by Boreal(15235)

Question 1040682: The price of a diamond varies directly as the square of its weight. If a diamond weighting 1.8 carats costs $5,235 what is the cost of a diamond of similar quality weighting 1.2 carats? Round to the nearest dollar
Click here to see answer by solver91311(24713)

Question 1040700: What is a trigonometric function which demonstrates an amplitude of 3 and a period of .π ?

Click here to see answer by ikleyn(52781)

Question 1040200: The ages of 10 brides at their marriage are given below.
32.7 35.9 23.6 23.8 43.7 30.2 24.5 36.1 30.4 33.4
A) Find the range of the data set. Round to the nearest tenth as needed.
Click here to see answer by Rockz123(2)

Question 1040320: Whats an example of an equation which gives the value of the Cosine function for an angle measure in its domain? What would this equation be in the form of an inverse function? TY
Click here to see answer by ikleyn(52781)

Question 1040202: Heights of men on a baseball team have a bell-shaped distribution with a mean of 167 cm and a standard deviation of 7cm. Using the empirical rule, what is the approximate percentage of the men between the following values?
A) 160 cm and 174 cm
B) 153 cm and 181 cm
Click here to see answer by Boreal(15235)

Question 1040791: Which graph in the image shows the following function?
y = 1/2 sin [4(0+30�)] + 2
Image: https://i.imgsafe.org/544d340994.png
A or B
Click here to see answer by solver91311(24713)

Question 1040811: What does each number represent in this equation?
R = 1200 + 250 sin 1/2πt
Image of reference: https://i.imgsafe.org/584044b530.png
I understand R is the number of rabbits ( 1200 ) I think 250 is the number of coyotes.
What does sin 1/2πt represent?

Click here to see answer by jim_thompson5910(35256)

Question 1040813: An object is thrown downward with anitial velocity of 6 feet per second.The relationship between the distance s it travels and time t isgiven by s=6t+16t^2. how long does it take the object tofall 76 feet?
It takes __-- seconds for the objec to fall 76 feet,
Click here to see answer by solver91311(24713)

Question 1040886: 7. party trays cost $ 14.00 to make with out labor, are sold for 35.00. two people work 8 hour shifts making the trays at $ 7.00 per hour, how many trays must be sold to cover all cost including labor ?
Click here to see answer by jorel555(1290)

Question 1040887: Find the length of the missing side. If necessary, round to the nearest tenth
A.72 B.17 C.51 D.36
Click here to see answer by Fombitz(32388)

Question 1040170: Factor completely and show a detailed solution
2a^k+3 + 2a^2 b^k + a^k+1 c^2k+3 + b^k c^2k+3
Click here to see answer by Edwin McCravy(20055)

Question 1040205: The mean value of land and buildings per acre from a sample of farms is
$1200 with a standard deviation of $200. The data set has a bell-shaped distribution. Assume the number of farms in the sample is 7878.
Use the empirical rule to estimate the number of farms whose land and building values per acre are between $1000 and $1400.
Click here to see answer by robertb(5830)

Question 1040931: I need help finding the sum of this arithmetic series.
Image of arithmetic series: https://i.imgsafe.org/6dd8440ee3.png
A.) 25
B.) 126
C.) 133
D.) 119

Click here to see answer by Fombitz(32388)

Question 1041000: Solve for the exact solutions in the interval [0,2π)
cos(2x)=cos(x)
I got 0 but apparently there are more solutions

Click here to see answer by Alan3354(69443)

Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 3871..3915, 3916..3960, 3961..4005, 4006..4050, 4051..4095, 4096..4140, 4141..4185, 4186..4230, 4231..4275, 4276..4320, 4321..4365, 4366..4410, 4411..4455, 4456..4500, 4501..4545, 4546..4590, 4591..4635, 4636..4680, 4681..4725, 4726..4770, 4771..4815, 4816..4860, 4861..4905, 4906..4950, 4951..4995, 4996..5040, 5041..5085, 5086..5130, 5131..5175, 5176..5220, 5221..5265, 5266..5310, 5311..5355, 5356..5400, 5401..5445, 5446..5490, 5491..5535, 5536..5580, 5581..5625, 5626..5670, 5671..5715, 5716..5760, 5761..5805, 5806..5850, 5851..5895, 5896..5940, 5941..5985, 5986..6030, 6031..6075, 6076..6120, 6121..6165, 6166..6210, 6211..6255, 6256..6300, 6301..6345, 6346..6390, 6391..6435, 6436..6480, 6481..6525, 6526..6570, 6571..6615, 6616..6660, 6661..6705, 6706..6750, 6751..6795, 6796..6840, 6841..6885, 6886..6930, 6931..6975, 6976..7020, 7021..7065, 7066..7110, 7111..7155, 7156..7200, 7201..7245, 7246..7290, 7291..7335, 7336..7380, 7381..7425, 7426..7470, 7471..7515, 7516..7560, 7561..7605, 7606..7650, 7651..7695, 7696..7740, 7741..7785, 7786..7830, 7831..7875, 7876..7920, 7921..7965, 7966..8010, 8011..8055, 8056..8100, 8101..8145, 8146..8190, 8191..8235, 8236..8280, 8281..8325, 8326..8370, 8371..8415, 8416..8460, 8461..8505, 8506..8550, 8551..8595, 8596..8640, 8641..8685, 8686..8730, 8731..8775, 8776..8820, 8821..8865, 8866..8910, 8911..8955, 8956..9000, 9001..9045, 9046..9090, 9091..9135, 9136..9180, 9181..9225, 9226..9270, 9271..9315, 9316..9360, 9361..9405, 9406..9450, 9451..9495, 9496..9540, 9541..9585, 9586..9630, 9631..9675, 9676..9720, 9721..9765, 9766..9810, 9811..9855, 9856..9900, 9901..9945, 9946..9990, 9991..10035, 10036..10080, 10081..10125, 10126..10170, 10171..10215, 10216..10260, 10261..10305, 10306..10350, 10351..10395, 10396..10440, 10441..10485, 10486..10530, 10531..10575, 10576..10620, 10621..10665, 10666..10710, 10711..10755, 10756..10800, 10801..10845, 10846..10890, 10891..10935, 10936..10980, 10981..11025, 11026..11070, 11071..11115, 11116..11160, 11161..11205, 11206..11250, 11251..11295, 11296..11340, 11341..11385, 11386..11430, 11431..11475, 11476..11520, 11521..11565, 11566..11610, 11611..11655, 11656..11700, 11701..11745, 11746..11790, 11791..11835, 11836..11880, 11881..11925, 11926..11970, 11971..12015, 12016..12060, 12061..12105, 12106..12150, 12151..12195, 12196..12240, 12241..12285, 12286..12330, 12331..12375, 12376..12420, 12421..12465, 12466..12510, 12511..12555, 12556..12600, 12601..12645, 12646..12690, 12691..12735, 12736..12780, 12781..12825, 12826..12870, 12871..12915, 12916..12960, 12961..13005, 13006..13050, 13051..13095, 13096..13140, 13141..13185, 13186..13230, 13231..13275, 13276..13320, 13321..13365, 13366..13410, 13411..13455, 13456..13500, 13501..13545, 13546..13590, 13591..13635, 13636..13680, 13681..13725, 13726..13770, 13771..13815, 13816..13860, 13861..13905, 13906..13950, 13951..13995, 13996..14040, 14041..14085, 14086..14130, 14131..14175, 14176..14220, 14221..14265, 14266..14310, 14311..14355, 14356..14400, 14401..14445, 14446..14490, 14491..14535, 14536..14580, 14581..14625, 14626..14670, 14671..14715, 14716..14760, 14761..14805, 14806..14850, 14851..14895, 14896..14940, 14941..14985, 14986..15030, 15031..15075, 15076..15120, 15121..15165, 15166..15210, 15211..15255, 15256..15300, 15301..15345, 15346..15390, 15391..15435, 15436..15480, 15481..15525, 15526..15570, 15571..15615, 15616..15660, 15661..15705, 15706..15750, 15751..15795, 15796..15840, 15841..15885, 15886..15930, 15931..15975, 15976..16020, 16021..16065, 16066..16110, 16111..16155, 16156..16200, 16201..16245, 16246..16290, 16291..16335, 16336..16380, 16381..16425, 16426..16470, 16471..16515, 16516..16560