which pair of numbers is relatively prime?
a. 12 and 16
b. 17 and 45
c. 21 and 35
d. 77 and 110

well none of the 2nd numbers r prime but in the first only b is so i guess b

the answer is 0.071

good luck! : d

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'.