Which of the following situations form a proportional relationship?
a.5 dvds for $9 and 15 dvds for $27
b.6 cups of coffee for $8 and 9 cups of coffee for $14
c.3 purses for $60 and 5 purses for $90
d.12 cans for $3 and 30 cans for $7.50
e.2 ink cartridges for $25 and 4 ink cartridges for $75

An empty bucket is placed under a faucet dripping at a constant rate of 4 milliliters per minute. with the given information, which of these statements is a reasonable conclusion? a there will be 24 milliliters of water in the bucket after 16 hour. b there will be 60 milliliters of water in the bucket after 14 hour. c there will be 160 milliliters of water in the bucket after 20 minutes. d there will be 100 milliliters of water in the bucket after 40 minutes.

The surface area of the triangular prism is .

Micheal is 4 times as old as brandon and is also 27 years older than brandon. how old is micheal