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Serggg [28]
3 years ago
14

A phone company charges a monthly rate of $12.95 and $0.25 a minute per call.

Mathematics
1 answer:
inn [45]3 years ago
4 0

Answer:

21.20-12.95=8.25

0.25=1min

8.25=xmin

x=8.25/0.25

x=33min

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An object is launched from ground level with an initial velocity of 120 meters per second. For how long is the object at or abov
babunello [35]

Answer:

D) 14 seconds

Step-by-step explanation:

First we will plug 500 in for y:

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We want to set this equal to 0 in order to solve it; to do this, subtract 500 from each side:

500-500 = -4.9t² + 120t - 500

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a = -4.9; b = 120; c = -500

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x=\frac{-b\pm \sqrt{b^2-4ac}}{2a}

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The two times the object is at exactly 500 meters above the ground are at 5 seconds and 19 seconds.  This means the amount of time it is at or above 500 meters is

19-5 = 14 seconds.

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