A boat moves 15 kilometers with the current (downstream) in the same amount of time it moves 10 kilometers against the current (upstream). If the rate of the current is 7 kilometers per hour, find the rate of the boat in still water.

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'.

a. she will receive a refund of $278.

step-by-step explanation: