You are given the sample mean and the population standard deviation. Use this information to construct the 90% and 95% confidence intervals for the population mean. Interpret the results and compare the widths of the
confidence intervals.
From a random sample of 49 business days, the mean closing price of a certain stock was $127.89. Assume the
population standard deviation is $11.55.

55? i think maybe

step-by-step explanation:

answer:  

step-by-step explanation:

here x represents the height of the pole,

and, the height of the shadow of the pole is 12 feet.

also, the angle of elevation from the top of the pole is 40°,

therefore,

by the low of sine,

which is the required equation for finding the value of x,

understand that i don't know the answers

will someone answer his question

your answer would be 12