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Gre4nikov [31]
2 years ago
6

Martha Washington walks 30 minutes each day. If she walks for 140 days, how many hours will she walk?

Mathematics
1 answer:
telo118 [61]2 years ago
5 0

70

make 30 minutes into an hour then divide 140 by 2

140/2=70

70x1=70

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Hi there!

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We can find the values of x for which f(x) is decreasing by finding the derivative of f(x):

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Taking the derivative gets:

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Find the values for which f'(x) < 0 (less than 0, so f(x) decreasing):

0 = -8/x³ - 2

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Another critical point is also where the graph has an asymptote (undefined), so at x = 0.

Plug in points into the equation for f'(x) on both sides of each x value to find the intervals for which the graph is less than 0:

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f'(-1) = -8/(-1) - 2 = 6 > 0

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(-\infty, \sqrt[3]{-4}) \text{ and } (0, \infty)

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