If 5 volunteers can wash 100 cars in 5 hours, find
the constant of variation.

20

Step-by-step explanation:

if you want to vary how many one can do in 5 hours you just have to subtract 5 from 100. need help just come to me

d. millimeters per hour.

step-by-step explanation:

we are given that,

carlo used a rain gauge to measure the amount of water his lawn is receiving from the sprinklers.

since, according to the options, we see that,

water cannot be measured by 'miles per hour', 'meters per second' and 'grams per seconds'.

we get that, the water can be measured by 'millimeters per hour'.

hence, the appropriate rate for describing the amount of water is 'millimeters per hour'.

i think the answer is b.

step-by-step explanation:

not 100% sure though.