Suppose that replacement times for washing machines are normally distributed with a mean of 10.9 years and a standard deviation of 1 years. If only 18% of washing machines lasts longer than Samsung, find the replacement
time for a Samsung washing machine.

a

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:

have a nice day!