The answer is: [D]: "Subtract 5 from 10" .
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Explanation:
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Use the correct order of operations, according to the mnemonic:
"PE MD AS".
The "P" stands for "parentheses", which takes top (first priority); and there are values in parentheses in this expression—specifically, the "(10 - 5)" . So the first step is to "subtract 5 from 10" —which is: "Answer choice: [D]".
Your error was starting at the beginning of the problem; and not using the "order of operations".
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Your dividing number for both is by 8. Since 8 hours divided by 8 equals 1. You will do the same to the top and get an answer of 25 miles!!
Answer:


Step-by-step explanation:

(a) If
are mutually exclusive, then

so we have

(b) If
are mutually independent, then




so that


