Roger has a nail that is 12 centimeters long he measures and records the length of the nail at 15 centimeters what is the percent of error in his measurement

The  percent of error in his measurement is:

                             25%

The percent error is calculated by the formula:

Roger has a nail that is 12 centimeters long he measures and records the length of the nail at 15 centimeters.

Hence,

          Hence, the percent error is: 25%.

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'.