Determine the point estimate of the population mean and margin of error for the confidence interval. Lower bound is 20 , upper bound is 30 .

equal to

step-by-step explanation:

a c

step-by-step explanation:

the answer is:

the answer is:

to solve the problem, we need to remember the quotient of power property, it's defined by the following relation:

if we have a quotienf of powers that have the same base, we need to keep the same base and subtract the exponent of the denominator power to the exponent of the numerator power.

so, we are given the expression:

then, calculating we have:

hence, the answer is:

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4.5%

step-by-step explanation: