Installation of a certain hardware takes a random amount of time with a standard deviation of 7 minutes. A computer technician installs this hardware on 50 different computers. These times are given in the accompanying dataset. Compute a 95% confidence interval for the mean installation time. Round your answers to two decimal places and use ascending order.

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Ответ:

dezmondpowell

20.12.2021

Mathematics

(A) f=3

Step-by-step explanation:

If cos(22f - 1) = sin(7f + 4)

We know by the rule of complementary trigonometric ratios that:

$\sin \theta =cos (90^\circ-\theta)\\$Therefore: \theta + (90^\circ-\theta)=90^\circ$

$A$pplying this rule$\\22f-1+7f+4=90^\circ\\29f+3=90^\circ\\29f=90^\circ-3\\29f=87^\circ\\$Divide both sides by 29\\f=3$

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