The lives (in hours of continuous use) of 100 randomly selected flashlight batteries are: Interval 6.95-7.45 7.45-7.95 7.95-8.45 8.45-8.95 8.95-9.45 9.45-9.95 9.95-10.45 hrs a. Find the mean of the battery lives. (Type an integer or a decimal. Round to two decimal places.) b. Find the standard deviation of the battery lives. hrs (Type an integer or a decimal. Round to two decimal places.) Frequency 2 8 21 39 18 10 2

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

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A: Hey, since there are multiple subparts posted, we will answer first question. If you want any…

A: e) -1+ is greater than -1, so we will take the second piece of the function

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A: The pair of alternate interior angles are equal. Angle 1 is equal to angle 2: ∠1=∠2…