Past experience has indicated that the breaking strength of yarn used in manufacturing drapery material is normally distributed and that σ = 4 psi. a random sample of 10 specimens is tested, and the average breaking strength is found to be 93 psi. find a 95% two-sided confidence interval on the true mean breaking strength. round the answers to 1 decimal place.

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step-by-step explanation:

answer:   28.56 feet (approx)

step-by-step explanation:

since, triangle abc has measure of angle c equal to 55 degrees, measure of angle abc equal to 90 degrees, and length of bc equal to 20 feet.

we have to find out the measurement of segment ab.

therefore, tan 55° =

but bc = 20 feet.

⇒ tan 55 ° =  

⇒ ab = 20 × tan 55 °

⇒ ab = 20 × 1.42814800674

⇒ ab = 28.5629601348   ≈ 28.56 feet

(5x-1)^2= (5x)^2-2(5x)×1+(1)^2=25x^2-10x+1

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step-by-step explanation: