A rectangle is twice as long as it is wide. Its perimeter (the sum of the lengths of its sides) is 84 cm. Find its length and width (in cm).

rounding to the nearest thousandth would be 452,000

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'.