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oksian1 [2.3K]
3 years ago
11

Fifteen times the square of a non-zero number is equal to 12 times the number. What is the number?

Mathematics
1 answer:
salantis [7]3 years ago
4 0
The answer is 0.8

15x^2=12x

15x=12

x=12/15  = 4/5   so the answer is 0.8
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A student dropped a textbook from the top floor of his dorm and it fell according to the formula s(t) = −16t 2 + 8√t , where t i
Sidana [21]

Answer:

<h2>-29.61m/s</h2>

Step-by-step explanation:

Given the distance of fall of the student in term of the time t expressed by the equation s(t) = −16t² + 8√t, to get the average speed of fall of the pencil after 2.8 secs, we will need to differentiate the given function first since Velocity is the change in distance of a body with respect to time i.e

V = d(s(t))/dt

s(t) = −16t² + 8t^1/2

V = -32t+1/2(8)t^(1/2 - 1)

V = -32t+4t^-1/2

The average speed of the fall Using the fact that the pencil hit the ground in exactly 2.8 seconds, will be gotten by substituting t = 2.8 into the resulting equation.

V = -32t+4(2.8)^-1/2

V = -32t+4/√2.8

V = -32+4/1.6733

V = -32+2.391

v = -29.61m/s

<em>Hence the average speed of the fall is -29.61m/s</em>

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3 years ago
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dedylja [7]
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3 years ago
the parent cosine function is transformed to create the function m(x) =-2cos(x+π). which graphed function has the same amplitude
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2 years ago
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