F = 1/T
Solve for T.
A T = f
B T = 1/f
C T = f^2
D T = 1/f^2

6 hours 48 min

step-by-step explanation:

68÷5=13.6

13.6×30=408min=6 hours 48 min.

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in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

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the correct answer is 1: 2

step-by-step explanation:

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