02/21/15

What is the height of the candle after 16 hours?
Suppose that the height (in centimeters) of a candle is a linear function of the amount of time (in hours) it has been burning. After 8 hours of burning, a candle has a height of 20.4 centimeters.... more
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02/21/15

z score and probability
suppose a bell shaped distribution, with a mean of 70 mph and a std dev of 8 mph. Calculate the Z score for someone traveling 95 mph. Is it likely to see someone going this fast? We must use Excel... more
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02/21/15

an apple weighs 9/16 of a pound another is 4/5 smaller, how much does the smaller apple weigh?
an apple weighs 9/16 of a pound another is 4/5 smaller, how much does the smaller apple weigh?
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02/20/15

Math Word Problem
Four girls sang songs in a concert in trios, with one girl sitting out each song. Hannah sang 7 songs, which was more than any other girl. Mary sang 4 songs which was fewer than any other girl. How... more
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02/20/15

Math word problem...Two of the top
two of the top-grossing concert were by a jazz band and a rock band. together the two tours visited 181 cities. The jazz band visited 99 cities more than the rock band. how many cities did each... more
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02/19/15

The population of a country is growing at a rate of 2.5% compounded continuously. If the population at present is 145 million, what the population will be afte
Write the answer to the nearest million. Please show steps. thank you.
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02/19/15

the cost of 3 markers and 2 pencils is $1.80. the cost of 4 markers and 6 pencils is $2.90. what is the value of each item?
The cost of 3 markers and 2 pencils is $1.80. The cost of 4 markers and 6 pencils is $2.90. What is the value of each item.
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02/19/15

Wendy took her brother Eliot to lunch at a restaurant. The cost of the food was $40 before the tax or tip. The tax was 4% of the cost of the food and the tip
Was 16% of the pre tax amount. What was the total cost of eating lunch  at the restaurant ?  
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02/19/15

If y=-8 when x=-3, find x when y=6.
Please answer and show steps, this kind of math is called, direct and inverse variation. Thank you.     Variation is direct
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02/19/15

Express the total time required to complete the 70 mile trip as a function of the rate x of the bike.
Josh rode his bike 17 miles from his home to Columbus, and then traveled 53 miles by car from Columbus to Dayton. Assume that the average rate of the car was 43 mph faster than the average rate of... more
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02/19/15

Please help?
a corn meal feeds is 10% protein and a feed supplement is 40% protein. how much of each must of each must be combined to get 2400 pounds of feed that is 19% protein
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02/19/15

The graph shows the total number of puzzle pieces packed in 3 jigsaws puzzle boxes of the same kind
Number of boxes: 3   Total number of pieces: 75   Mikes says that 225 puzzle pieces will be packed in 9 boxes. Which statement supports Mike's claim?   A. (9,225) lies on the straight line... more
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02/19/15

Given that f'(x)=lnx evaluate the limit as h approaches 0 (f(2+h)-f(2))/h
Please explain how to do this 
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02/19/15

Can some please help me!
For the following distributions, draw the approximate shape and identify what scores would correspond to ONE standard deviation unit above and below the mean. A). Distribution #1, mean = 45, Sx =... more
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02/19/15

The distance around a meteor crater is 9,415. Find the diameter of the crater. use 22/7 for PI
I NEED HELP!!!!
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02/19/15

Identify the solutions of the sytem oof equations if any x=1 y=1
a. no solution b. (0,0) c. (1,1) d. infinately many solutions
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02/19/15

A race car has to cover 50 k. fuel for max dist of 53k Dist given by S(t)=3t+47, t is time in hrs. Whats min&max hrs?
Alan participated in a car race in which he had to cover at least 50 k. He had fuel in his car for a maximum distance of 53 k. If the distance is given by S(t)=3t+47, where t is the time in hours,... more
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02/19/15

1 number is 4 less than a second number. Three times the first is 6 more than 6 times the second. Find the numbers
 Please help! I can't seem to figure this out and IVe been stuck on it for over an hour!
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02/18/15

Need help with this so I can help explain to my 6th grader
Here is a word problem that my son is working on. I am having trouble with  it :(   Melvin had some cartons of milk. He sold 2/5 of the cartons in the morning. He then sold 3/4 of the remainder... more
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02/18/15

How many greeting card?
A store charges $32 to print 80 greeting cards and $0.33 for each additional greeting card.   Part A: write an equation to find the total cost, t, of 80 greeting cards and, c, additional... more
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02/18/15

About 1/11 of the Canadian population lives in Alberta
About 1/11 of the Canadian population lives in Alberta.   a) express this fraction as a decimal    b) round your answer to the nearrest thousandth
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02/17/15

Trig Identities
Prove the identity: tan^2(x)-sin^2(x)= tan^2(x)sin^2(x)
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02/17/15

Scale factor of office building to the model?
An architect is designing an office building that is to be a width of 50 feet, a length of 50 fee, and a height of 100 feet. A scale model of the same building is to have a width of 18 inches, a... more
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02/17/15

15 1/2 inches into 12 parts
I need to divide 15 1/2 inches into 12  parts
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02/17/15

Suppose that E and F are two events and that N(E and F)=300 and N(E)=730. What is P(F|E)?
Please help me out with this question. I have no idea how to even start this.
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