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Question 1128999: the grades are given for a student for a particular semester. Use weighted means to find the grade point average. Assume the grade point values are A = 4, b =3, C = 2, D = 1, and F = 0. Round your answer to the nearest tenth when necessary.
------------------------------------------
Grades:
B
A
C
A
A
Credit Hours:
4
2
3
3
4
Click here to see answer by josgarithmetic(39613)

Question 1129007: Question 52
Each individual letter of the word TENNESSEE is placed on a piece of paper
and all 9 pieces of paper are placed in a hat. If one letter is selected at
random from the hat, determine the probability that:
#52 the letter V is not selected
Click here to see answer by Edwin McCravy(20054)

Question 1129002: Hi
find the equation of the locus of a point P(x, y) that moves according to the following conditions.
The distance of P from the line y=-5 is 3/4 of its distance from the line x=2.
Thanks
Click here to see answer by greenestamps(13195)

Question 1129082: The product of a number and -3,increased by 8, is 20
Click here to see answer by josmiceli(19441)

Question 1129000: Hi
What is the equation of the locus of a point P(x, y) that moves according to the following conditions
the distance of P from the y axis is 3 times its distance from the x axis.
Thanks
Click here to see answer by greenestamps(13195)

Question 1129005: Question 24
Two thousand raffle tickets are sold for $3 each. Three prizes will be awarded:one for $1000 and two for $500. Assume that the probability that any given ticket is selected for the $1000 prize is 1200012000 and the probability that any given ticket is selected for the $500 prize is 2200022000. Jeremy purchases one of these tickets.
A. Determine his expected value.
B. Determine the fair price of a ticket.
Click here to see answer by greenestamps(13195)

Question 1129112: Determine capacity (gal.) of a pipe 1450' in length, 7/8" diameter.
Pipe is a cylinder.
Volume of cylinder; pi * r^2 * height, or length.
3.1416 * .4375 * .4375 * 17400 = 10463.000625 = 10463 cu. in.
231 cu. in. in 1 gal.

10463 / 231 = 45.2943722 = 45 gal.
Where am I incorrect? Non-homework.

Click here to see answer by greenestamps(13195)

Question 1129182: How do I figure out the length, width, and height with only knowing the square feet? The square feet is 1,500. We were asked how long the square would be if it was 1,500.
Thank you!
Click here to see answer by math_helper(2461)

Question 1129162: If I invest $1,000 at 5.5% APR, what is the difference in time it takes to triple if it is compounded quarterly as opposed to compounded continuously?
I have gotten 20.11 years for the quarterly and 19.97 years for continuously. I think the problem is asking for this and then to subtract them, but I'm not sure.

Click here to see answer by math_helper(2461)

Question 1129193: The price of a computer is decreasing at an exponential rate. In 1985, a desktop computer cost $2,500. The price of a comparable computer is decreasing by 3.5% every 2 years. During what year is the price of that comparable computer $1,200?
Click here to see answer by stanbon(75887)

Question 1129232: The height of a door is 1.3 feet longer than its width, and its front area is 1579.6 square feet. Find the width and height of the door.
Click here to see answer by MathLover1(20849)

Question 1129160: A rumor at Hearsay High School is started by 2 students and grows exponentially. 12 minutes later, 15 students know the rumor. How long will it take for the entire population of Hearsay (1,250 students) to hear the rumor (nearest minute).
Click here to see answer by greenestamps(13195)

Question 1129270: The diameter of a circle is 875 yards. Find the side of a square of equal size.
Area of circle; pi * r^2
Area of square = s^2
Not sure how to solve. Not homework.

Click here to see answer by josgarithmetic(39613)

Question 1129307: You need to buy a new refrigerator for your house. There are two models that you are comparing. A standard model cost $400 and uses $8 of electricity per month. An energy efficient model cost $800 and uses $4 of electricity per month.
1. Write a linear equation that represents the total cost of the standard model of the refrigerator. Use C for the total cost and t for time measured in months.
2, Write a linear equation that represents the total cost of energy efficient model of the refrigerator. Use C for the total cost and t for time measured in months.
3. Label both axis and then graph the system of equations from questions 1 and 2. Indicate and label the solution to the system of equations on the graph.
4.Solve the linear system from questions 1 and 2 using the substitution method.
5. Solve the linear system from questions 1 and 3 using the elimination method.
6. In terms of these two refrigerators, what does the intersections of the lines in question 3 represent?
7. How are the solution in 3,4,and 5 related?why?
8. Which refrigerator would you buy? Justify your answer.
Click here to see answer by Boreal(15235)

Question 1129328: The half-life of Calcium-47 is 4.536 days. What is the daily decay rate? Give your answer in both decimal and percent form.
a) As a decimal, the daily decay rate is _____?
Click here to see answer by greenestamps(13195)

Question 1129327: A research student is working with a culture of bacteria that doubles in size every 20 minutes. The initial population count was 1200 bacteria.
a)Rounding to four decimal places, write an exponential equation representing this situation.
b)Rounding to the nearest whole number, use B(t) to determine the population size after 3 hours
Click here to see answer by josgarithmetic(39613)

Question 1129326: A biologist recorded a count of 320 bacteria present in a culture after 8 minutes and 1200 bacteria present after 26 minutes.
Rounding to four decimal places, write an exponential equation representing this situation.
Click here to see answer by josgarithmetic(39613)

Question 1129378: A water skier skis over the ramp shown in the figure at a speed of 30 feet per second. How fast is she rising as she leaves the ramp?
Picture of a triangle, where one of the longer legs is 15 ft, and the other shorter leg is 4 ft.
Click here to see answer by ikleyn(52752)

Question 1129384: The area of a circle is 3 1/7 times the square of the radius. Find weight of a circular disc of cast iron 7 ft. in diameter and 1 1/3 in. thickness.
A plate of cast iron 1 ft. square and 1 in. thickness weighs 37.5 lbs.
Attempt:
The disc is a cylinder.
Volume; pi * r*2 * height. 3.1416 * 3.5 * 3.5 * .1108333 = 4.265375 cu. ft.
Not sure how to continue.
Click here to see answer by josgarithmetic(39613)

Question 1129434: The Sanders family and the Price family each used their sprinklers last summer. The water output rate for the Sanders family's sprinkler was 25L per hour. The water output rate for the Price family's sprinkler was 35L per hour. The families used their sprinklers for a combined total of 75 hours, resulting in a total water output of 2225 . How long was each sprinkler used?
Click here to see answer by josgarithmetic(39613)

Question 1129472: The postage cost of a parcel is $2.15 per gram and $0.85 for each additional gram. Mike wanted to post a package weighing 72 grams. How much did he pay for the postage?
Click here to see answer by Alan3354(69443)

Question 1129374:

10. Amanda and Ndiba are selling flower bulbs for a school fundraiser. Customers can buy packages of tulip bulbs and bags of daffodil bulbs. Amanda sold 6 packages of tulip bulbs and 12 bags of daffodil bulbs for a total of $198. Ndiba sold 7 packages of tulip bulbs and 6 bags of daffodil bulbs for a total of $127. Find the cost each of one package of tulips bulbs and one bag of daffodil bulbs.
Click here to see answer by ankor@dixie-net.com(22740)

Question 1129521: Mr. Groff's class has more than 20 students but fewer than 30. The class was split into 5 equal groups. How many students are in the class?
Click here to see answer by ikleyn(52752)

Question 1129517: Two cars are initially 1200 miles apart. At the same time Car A starts driving at 35 mph to the east while Car B starts driving at 55 mph to the north (see sketch below for this initial setup). At what rate is the distance between the two cars changing after (a) 5 hours of travel, (b) 20 hours of travel and (c) 40 hours of travel?
Click here to see answer by ikleyn(52752)

Question 1129513: If the ones digit in a two-digit number is even,the number is a composite number. Which odd ones digit also tells you the number must be a composite number?
Click here to see answer by ikleyn(52752)

Question 1129511: Carmen put 16 strawberries in dishes. The number of strawberries she put in each dish is the same as the number if the dishes. How many strawberries did Carmen put in how many dishes?
Click here to see answer by ikleyn(52752)

Question 1129556: Rania plans to spend no more than $230 on some new clothes to add to her wardrobe. The skirts she wants to buy cost $39.99 each. She just purchased four shirts at American Eagle for $12 each. How many skirts can she buy?
Click here to see answer by stanbon(75887)

Question 1129557: Students in the school band are selling calendars. It costs them $125 to make the
calendars but they earn more than $327 after their expenses. How many must they
sell to meet their goal?
Click here to see answer by Edwin McCravy(20054)

Question 1129574: Silly question, but I want to make sure I'm reading/doing it correctly.
-How many different lines can 11 people form?
Is the following the proper way to solve this question:
11*10*9*8*7*6*5*4*3*2*1
Thank you!
Click here to see answer by Boreal(15235)

Question 1129577: A folded flag will fit in an isosceles right triangle case. The inside dimension across the bottom of the case is 2 1/2 inches. Using trigonometric functions, find the length x (the 2 sides) and round the answer to the nearest of an inch.
Click here to see answer by josmiceli(19441)

Question 1129579: Sec. 12.3 # 48
23. Quartiles The prices of the 20 top-rated top-loading washing machines, as reported in the August, 2014, issue of Consumer Reports, are as follows:
$1200$950$1100$600$750$800$800$1000$1000$1200$800$700$900$1000$700$1500$1000$1000$800$700$1200$950$1100$600$750$800$800$1000$1000$1200$800$700$900$1000$700$1500$1000$1000$800$700
23. Determine
a. Q2
b. Q1
c. Q3

Click here to see answer by MathLover1(20849)

Question 1129607: If asked to find the probability if two dice are rolled of, (sum is 3 or 6).
Would the answer be 7/36, adding all 3 & 6 possibles together?
Or-
Is it asking for sum of 3 = 2/36 or sum of 5=4/36, asking for 2 separate probabilities?
Thank you

Click here to see answer by MathLover1(20849)

Question 1129581: 5. Raffle Tickets Ten thousand raffle tickets are sold for $5 each. Four prizes will be awarded: one for $5000, one for $2500, and two for $1000. Assume that the probability that any given ticket is selected for the $5000 prize is 110,000110,000, the probability that any given ticket is selected for the $2500 prize is 110,000110,000, and the probability that any given ticket is selected for a $1000 prize is 210,000210,000.
Sidhardt purchases one of these tickets.
a. Determine his expected value.
b. Determine the fair price of a ticket.

Click here to see answer by greenestamps(13195)

Question 1129686: Could someone help explain how to correctly solve the equation.
The population P of a fish farm in t years is modeled by the equation
P(t) = 2200/ 1 + 9e^−0.8t
What is the initial population of fish?

Click here to see answer by greenestamps(13195)

Question 1129730: can someone please assist me in understanding what I am doing wrong:
A pot of boiling soup with an internal temperature of 100� Fahrenheit was taken off the stove to cool in a 65�F room. After fifteen minutes, the internal temperature of the soup was 95�F.
Use Newton's Law of Cooling to write a formula
T(t) that models this situation, where T is the temperature of the soup in degrees Fahrenheit and t is time in minutes.

Here is my work:
For the pot of boiling soup;
A=100-65=35
T(t)= 35 e^ ( ( kt ) ) +65
*From there I isolated the variables, took the ln of each equations and then divided the ln of 30/35
by 15.
The formula that models the cooling of the soup is
T(t)= 35 e^( (-0.0103 ) ) +65
This however keeps being labeled incorrect
Click here to see answer by jim_thompson5910(35256)

Question 1129765: A door mat's area is 882 sq. in. If the length had been 6 in. less and width 5.5 in. more, the mat would have been square. Determine dimensions.
Area = Length * Width
L * W = 882
L - 6
W + 5.5
Not sure how to solve.
Click here to see answer by rothauserc(4718)

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