Which of the following represents "four times the square of a number is thirty-six"?

a) 42x = 36
b) 4x2 = 36
c) (4x)2 = 36

Option (b) is correct.

Step-by-step explanation:

 Given  expression "four times the square of a number is thirty-six"

We have to write it mathematically and choose the correct options out of given options.

Consider the given expression  "four times the square of a number is thirty-six"

Then

let the number be x ,

Then four times the square of a number written mathematically as

And given "four times the square of a number is thirty-six" written mathematically as

Therefore, "four times the square of a number is thirty-six" written mathematically as

Option (b) is correct.

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'.