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sladkih [1.3K]
3 years ago
15

A ball is kicked 4 feet above the ground with an initial vertical velocity of 55 feet per second. The function h(t)=-16t^2+55t+4

represents the height h (in feet) of the ball after t seconds. Using a graph, after how many seconds is the ball 30 feet above the ground? Round your answers to the nearest tenth. (Two answers!)

Mathematics
1 answer:
Shalnov [3]3 years ago
6 0

Answer:

Time in seconds when the ball is 4 feet above the ground is:

t= 0.6 and 2.9.

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The value of a in the equation ax + y = 5 , if x = 2 and y = 3 is a) – 1 b) 0 c) 1
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Answer:

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Step-by-step explanation:

=> ax+y = 5

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<em>Dividing both sides by 2</em>

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kvv77 [185]

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Find the value of x to the nearest tenth.
vladimir1956 [14]

Answer:

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Step-by-step explanation:

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∠B = 46

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Process

To solve this problem use, the law of sines. This law states that the ratio of a side of a triangle to the sine of the opposite angle is the same for all three sides.

The law of sines for this problem is

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-Solve for x

                          x = 7 sin 46 / sin 20

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                          x = 7 (0.719) / 0.342

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