# homework help

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Posted by desire on October 13, 2002 at 20:08:37:

1) The volume of a cone is V= 1/3 Pie r squared. Rewrite th formula for H in tems of V nd R?? please show the steps please..

2) If A is directly proportional to the cube of b, write the equation.

11) Mrs Johnon is 3 times as old as her son. Ten years ago she was 5 times as old as her son was then. Find Mrs Johnon's present age?

12) John in 5 years older then Mary. Ten years from now,the sum of their ages will be 39. How old is John now?

13) Jaime has a 15% discount coupon for Foleys Red apple Sale. If se buys a shirt for \$25 and jeans for \$35 (regular price), write an equation that show the
A) discount she would get
b) amount she would pay with the discount coupon
14) a) If y varies directly as x and y=-16 when x=2 find y when x=-12
b) If y varies directly as x and y=-12 when x=-18, find x when y=24

16) write variation equaion for the following:
a) intesity I of lightvarie inversely as the square of the observers distance d from the light source
b) price of pizza p varies diectly with the square of its diameter

20) one number is twice another #. If u take one-fourth of the lesser # and subtract it from the greater # u get 21 find the leser # and the greater #??

21) Rent--Truck's rates are \$50 per day plus \$0.50 per mile and Sam's U-Drive's are \$70 a day plus \$).45 per mile.
a) Find the mileage at which the cost for the two will be the same?
b) what is the cost?
c) when should u rent from rent a truck rather than Sams u-drive?
D) When should u rent rom Sams U-drive rather than Rent a truck?

PLEASE EXPLAIN AND SHW ME HOW U GOT THE ANSWERS PLEASE!!!!

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