Abathtub contains 20 gallons of water. after the drain is opened, there are 14 gallons of water remaining after 30 seconds. using this information, how can you describe the rate of change in the amount of water remaining in the tub per second?

you never say the total so we cant find the percentage used for petrol

step-by-step explanation:

problem:

f(x) = - 2/3x + 5; f(5/2)

substitute 5/2 in for x:

f(5/2) = -2/3(5/2) + 5

simplify the right side:

f(5/2) = -5/3 + 5

f(5/2) = 10/3

f(5/2) = 10/3

i hope this !