The answer is: [A]: 52.5 (mi.)

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Explanation:

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Use the formula: D = r*t .

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{Note of interest: The formula is not unique to this specific problem; but is actually true and will appear in physics and even advanced math and calculus!).

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In which: D = distance traveled (which we want to solve);

r = rate of travel; which we are given as: “15 mi / h” ;

t = time traveled; which we are given as: “3.5 h” ,

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We want to solve for “D”.

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Make sure all the units are equal (which they are!). They are all in “mi.” and “hours”. And the questions asks for the value in miles

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D = r * t ; solve for “D” ; by plugging in our known values of “r” and “t”:

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→ D = r * t = * (3.5 h) ;

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→ The 2 “h’s” cancel out; and we are left with:

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→ D = (15 mi.) * 3.5 = 52.5 mi. → which is answer choice: [A].

______________________________________

________________________________________

Explanation:

_________________________

Use the formula: D = r*t .

_________________________

{Note of interest: The formula is not unique to this specific problem; but is actually true and will appear in physics and even advanced math and calculus!).

____________________________________________

In which: D = distance traveled (which we want to solve);

r = rate of travel; which we are given as: “15 mi / h” ;

t = time traveled; which we are given as: “3.5 h” ,

______________________________________________

We want to solve for “D”.

______________________

Make sure all the units are equal (which they are!). They are all in “mi.” and “hours”. And the questions asks for the value in miles

___________________________________

D = r * t ; solve for “D” ; by plugging in our known values of “r” and “t”:

____________________________________

→ D = r * t = * (3.5 h) ;

____________________________________

→ The 2 “h’s” cancel out; and we are left with:

______________________________________

→ D = (15 mi.) * 3.5 = 52.5 mi. → which is answer choice: [A].

______________________________________