) Jacob reads a number of books in July and 8 books in August. During the same months, Marcus reads 3 times as many books as Jacob. Jacob let’s b represent of books he reads in July. He finds that the number of books that Marcus reads during both months is 3 times the sum of b and 8. Write and expression to represent the number of books that Marcus reads during both months.

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'.