How many solutions can be found for the equation 4x = 4x?

zero
one
two
infinitely many

coin flip

non-answer:

choosing

sorry if this isnt what you're looking for i dont really understand the question

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'.