Derek tried to solve an equation step by step.
Eque
8d - 72
8d
72
Step 1
250 12
8
8
d8 Step 2
Sial Sum
Find Derek's mistake
Choose 1 answer
A
Step 1
B
Step 2
C
He Did not make a mistake

Jayne is studying urban planning and finds that her town is decreasing in population by 3% each year. the population of her town is changing by a constant rate.true or false?

Will mark brainliest! ( explain the answer too, it can be one sentence)

A. find the power of the test, when the null hypothesis assumes a population mean of mu = 450, with a population standard deviation of 156, the sample size is 5 and the true mean is 638.47 with confidence intervals of 95 b. find the power of the test, when the null hypothesis assumes a population mean of mu = 644, with a population standard deviation of 174, the sample size is 3 and the true mean is 744.04 with confidence intervals of 95% c. find the power of the test, when the null hypothesis assumes a population mean of mu = 510, with a population standard deviation of 126, the sample size is 10 and the true mean is 529.44 with confidence intervals of 95