The formula for the volume of a sphere is V = 4 /3 ∏ r 3, where r is the radius of the sphere. The radius of the Moon is 1 /4 of the radius of the Earth. Answer the following questions.
a. If the volume of the Earth is V = 4 /3 ∏ r 3, write the volume of the Moon in terms of r.
b. Find the ratio of the volume of the Earth to the volume of the Moon.

When benny’s sister penny is 24, benny’s age will be 125% of her age. how old is lenny? a) how old will benny be then? b)if benny is 12 years old now, how old is penny now? explain your reasoning.

Harry’s soccer team plays 2 nonconference games for every 3 games that they play against conference opponents. if y represents the number of nonconference games and x represents the number of conference games, which equation best models this proportional relationship? a)y=2/3 x b)y=3/2 x c)y = 2x d)y = 6x

Marco has $38.43 dollars in his checking account. his checking account is linked to his amazon music account so he can buy music. the songs he purchases cost $1.29. part 1: write an expression to describe the amount of money in his checking account in relationship to the number of songs he purchases. part 2: describe what the variable represents in this situation.