Which of the following is NOT a requirement for testing a claim about a standard deviation or variance? A. The sample is a simple random sample. B. The chi-square distribution is used. C. The population has a normal distribution. D. The population must be skewed to the right.

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'.

4+4+2x

or

2x+8

step-by-step explanation:

the answer would be a 24

step-by-step explanation:

c=2πr=2·π·3=24