A researcher records the repair cost for 2020 randomly selected stereos. A sample mean of $57.17$ 57.17 and standard deviation of $19.26$ 19.26 are subsequently computed. Determine the 90%90% confidence interval for the mean repair cost for the stereos. Assume the population is approximately normal. Step 1 of 2: Find the critical value that should be used in constructing the confidence interval. Round your answer to three decimal places.

the smallest possible measurement of the width is 14 feet

step-by-step explanation:

let's assume length of parallelogram is 'l'

width of parallelogram is 'w'

the perimeter of a parallelogram must be no less than 40 feet

so, we get

we are given

length of parallelogram is 6 feet

so,

l=6

we can plug it

now, we can solve for w

subtract both sides by 12

divide both sides by 2

and we get

so,

the smallest possible measurement of the width is 14 feet

$54.99

step-by-step explanation:

$54.99 includes 500 min. if she does not exceed 500 min then her bill is $54.99

i believe it's a.

i'm not sure on this one, most likely correct.

step-by-step explanation:

what was your answer?