How do you use unit rates to convert measurements?

What is the base of 1/9 to the power of 2

Select the margin of error that corresponds to the sample mean that corresponds to each population: a population mean of 25, a standard deviation of 2.5, and margin of error of 5%

Savannah had 40 iris blooms last year this year she had 15% more iris blooms how many more hours blooms did savannah have this year