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Question 948940: In a certain culture the rate of growth of bacteria is proportional to the amount present. Initially, 1000 bacteria are present and the amount doubles in 12 minutes. Determine the time it takes for the bacteria to multiply to 10,000.
Click here to see answer by stanbon(75887)

Question 949247: Simplify (3a4b5c)4.
Click here to see answer by Alan3354(69443)

Question 949249: Simplify (4x2y) (2xy2z3)3.
Click here to see answer by Alan3354(69443)

Question 949443: Simplify a^4 b^3/a^7 b
Click here to see answer by Theo(13342)

Question 949805: The five tyres of a car(4 road tyres and the spare) were each used equally on a car which had travelled 20000 km. The number of kms of use of each tyre was?
a. 4000
b. 5000
c. 16000
d. 20000

Click here to see answer by macston(5194)

Question 949959: Simplify the expression. All answers should include only positive exponents.

(7^-4)/(7^-7)
Click here to see answer by Fombitz(32388)

Question 950009: Simplify the expression. All answers should include only positive exponents.

((a^2b^-4)/b^2)^5
Click here to see answer by Alan3354(69443)

Question 950014: Simplify the expression. All answers should include only positive exponents.

((x^3y^-2)/(z^-5))^-4
Click here to see answer by Alan3354(69443)

Question 950010: Using a powerful air gun, a steel ball is shot vertically upward with a velocity of 80 meters per second, followed by another shot after 5 sec. Find the initial velocity of the second ball in order to meet the first ball 150 meters from the ground.
Click here to see answer by Alan3354(69443)

Question 950050:
The coordinates below represent two linear equations. How many solutions does this system of equations have?

Line 1
x y
�4 8
4 6

Line 2
x y
�1 1
3 5

A.

0

B.

exactly 1

C.

exactly 2

D.

infinitely ma

Click here to see answer by rfer(16322)

Question 950011: A total of 0.8 kg of water at 20 deg. C is placed in 1 kW electric kettle. How long a time is needed to raise the temperature of water to 100 deg. C
Click here to see answer by Fombitz(32388)

Question 950251: The floor of a rectangular storage room is divided into two right triangles by drawing a diagonal. One leg of the resulting triangle, the width of the room, is 4 feet more than two times the other leg, the length of the room. The hypotenuse is 26 feet. Find the length and the width of the room.
Click here to see answer by jhaashok630(18)

Question 950295: Find the length of the arc of the parabola x2 = 4y from x= -2 to x =2
Click here to see answer by Fombitz(32388)

Question 950268: Factor Completely:
x^4-15x^3+81x^2-185x+150
Click here to see answer by Fombitz(32388)

Question 950368: What is the solution to the system?

Line 1
x y
�2 �4
�1 �1

Line 2
x y
2 3
3 1

( , )

Click here to see answer by Alan3354(69443)

Question 950608: Twenty five is 300% of what number?
Click here to see answer by nerdybill(7384)

Question 950693: 3, 1, -2 i need a polyniomial function that has given zeros

Click here to see answer by rothauserc(4718)

Question 950762: draw the graph of the function: {(2,-2),(5,3),(3,0),(-1,3),(0,4)}
Click here to see answer by Fombitz(32388)

Question 951037: the diameter of a wheel is 1.6 cm find out the distance covered with 500 revolution?
Click here to see answer by josmiceli(19441)

Question 950986: the rate of a chemical reaction varies, depending on the initial amount of a certain compound. In general, the reaction rate, V, can be expressed by the following formula, where k is a positive constant, and a is the initial amount of the compound. v(x)=kx(a-x) The positive constant, k, for one such reaction is 0.6, and the initial amount of the compound, a, is 18. For what value of x is the rate a maximum.
Click here to see answer by ankor@dixie-net.com(22740)

Question 951138: John is twice as as old as mary.If sum of sqeare of their ages is 125,find mary age.
Click here to see answer by Fombitz(32388)

Question 951388: Identify the solution(s) of the system of equations, if any.
-4x - 6y = 12
12y = -8x - 24
Click here to see answer by MathLover1(20849)

Question 951388: Identify the solution(s) of the system of equations, if any.
-4x - 6y = 12
12y = -8x - 24
Click here to see answer by checkley77(12844)

Question 951571: The radius of the circle with a central angle of 4 radians that intercepts an arc with length 77 cm is: ____ cm.
The radius of the circle with a central angle of 300 degrees that intercepts an arc with length 16 miles is: ______ miles.
Click here to see answer by Alan3354(69443)

Question 951751: a fence forms a rectangle and uses 64 meters of fencing.if the width of the enclosed area is 13 meters what is the length
Click here to see answer by macston(5194)

Question 952408: 5.Solve this children�s rhyme:
As I was going St. Ives,
I met a man with seven wives;
Every wife had seven sacks;
Every sack had seven cats;
Every cat had seven kits;
Kits, cats, sacks and wives,
How many were going to St. lives.?

Click here to see answer by MathLover1(20849)

Question 952779: A theater has 500 balcony seats and 1800 main level seats. If tickets for balcony seats will cost $15 less than tickets for main level seats, what should the prices be for each type of ticket so that total revenue from a sellout performance will be $33,840?
Click here to see answer by MathLover1(20849)

Question 953121: The sum of three consecutive integers is 36. What are the numbers?
Click here to see answer by rfer(16322)

Question 954683: Word Problem of Pythagoras' Theorem;
Question: PQRS is a rectangle in which PQ = 9 cm and PS = 6 cm. T is a point on PQ such that PT = 7 cm and RV is the perpendicular from R to ST. Calculate ST and RV.

Please solve this, it's gonna come in exam and it carries 10 marks itself. I tried so hard to solve it but I couldn't. I'd really appreciate it if you guys could solve this! Thanks a lot.
Regards,
Saad Ali

Click here to see answer by Fombitz(32388)

Question 954837: I need to be able to better remember math things
Click here to see answer by EdenWolf(517)

Question 955002: ay can complete his school project in x hours.What part of the job can be completed by jay after 5 hours?

Click here to see answer by amarjeeth123(569)

Question 955009: y=x^2-4
5x+y=20
solve by the following system of substitution
Click here to see answer by Fombitz(32388)

Question 955256: a butcher standing 6ft and 4inches tall.His shoe is number 12 what does he weigh?

Click here to see answer by macston(5194)

Question 955392: What is the weekday of august 15, 1947
Click here to see answer by EdenWolf(517)

Question 955588: I need help, I am unsure on how to work out this Graph sketch.
Title: Transformations of Functions
Question: y=x^2 + 4x - 1
It'd be a great help if you can show me how to sketch this on a graph!

Click here to see answer by macston(5194)

Question 955607: I have a 67 in my Statistics class, my final test is 15% of my final grade, what would I need to pass with a 70?
Click here to see answer by lwsshak3(11628)

Question 956097: Please help me solve this word problem:One number is nine more than a second number. Six times the first is 12 less than 4 times the second. Find the numbers.
Click here to see answer by Zucchini(70)

Question 956653: What is the lower quartile, Q1, of the following data set?
51, 50, 46, 56, 56, 63, 45, 60, 46, 57, 52, 39, 49, 53, 42
Click here to see answer by stanbon(75887)

Question 956860: If the tires of a vehicle are rotating 100 times per minute, with a radius of 1 1/2 ft, how fast is the vehicle moving?
Click here to see answer by macston(5194)

Question 956874: if $8000 is invested in a 2.5% account for 10 years compounded continuously how long would it take for the account to double?
Click here to see answer by lwsshak3(11628)

Question 956876: If a right triangle has a hypotenuse of length 17 and an adjacent side of length 15? what is the missing side? And find all 6 trigonometric functions?
Click here to see answer by Fombitz(32388)

Question 956873: if $8000 is invested in a 2.5% account for 10 years compounded quartly how long would it take for the account to double?
Click here to see answer by Fombitz(32388)

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, 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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, 16561..16605, 16606..16650, 16651..16695, 16696..16740, 16741..16785, 16786..16830, 16831..16875, 16876..16920, 16921..16965, 16966..17010, 17011..17055, 17056..17100, 17101..17145, 17146..17190, 17191..17235, 17236..17280, 17281..17325, 17326..17370, 17371..17415, 17416..17460, 17461..17505, 17506..17550, 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20746..20790, 20791..20835, 20836..20880, 20881..20925, 20926..20970, 20971..21015, 21016..21060, 21061..21105, 21106..21150, 21151..21195, 21196..21240, 21241..21285, 21286..21330, 21331..21375, 21376..21420, 21421..21465, 21466..21510, 21511..21555, 21556..21600, 21601..21645, 21646..21690, 21691..21735, 21736..21780, 21781..21825, 21826..21870, 21871..21915, 21916..21960, 21961..22005, 22006..22050, 22051..22095, 22096..22140, 22141..22185, 22186..22230, 22231..22275, 22276..22320, 22321..22365, 22366..22410, 22411..22455, 22456..22500, 22501..22545, 22546..22590, 22591..22635, 22636..22680, 22681..22725, 22726..22770, 22771..22815, 22816..22860, 22861..22905, 22906..22950, 22951..22995, 22996..23040, 23041..23085, 23086..23130, 23131..23175, 23176..23220, 23221..23265, 23266..23310, 23311..23355, 23356..23400, 23401..23445, 23446..23490, 23491..23535, 23536..23580, 23581..23625, 23626..23670, 23671..23715, 23716..23760, 23761..23805, 23806..23850, 23851..23895, 23896..23940, 23941..23985, 23986..24030, 24031..24075, 24076..24120, 24121..24165, 24166..24210, 24211..24255, 24256..24300, 24301..24345, 24346..24390, 24391..24435, 24436..24480, 24481..24525, 24526..24570, 24571..24615, 24616..24660, 24661..24705, 24706..24750, 24751..24795, 24796..24840, 24841..24885, 24886..24930, 24931..24975, 24976..25020, 25021..25065, 25066..25110, 25111..25155, 25156..25200, 25201..25245, 25246..25290, 25291..25335, 25336..25380, 25381..25425, 25426..25470, 25471..25515, 25516..25560, 25561..25605, 25606..25650