Question

Hello I have a question for this problem A penny is thrown from the top of a 30.48-meter building and hits the ground 3.45 seconds after it was thrown. The penny reached its maximum height above the ground 0.823 seconds after it was thrown. The quadratic function h expresses the height of the penny above the ground (measured in meters) as a function of the elapsed time, t, (measured in seconds) since the penny was thrown. What are the zeros (roots) of h? I would like to know where does the value of b= 8.05712 came from?

Answer #1

The answer for above problem is explained below.

1. Two identical eggs were thrown at the same time from the top
of a building of height 100 m at a speed 20. One egg was thrown at
an angle 40° above the horizontal while another was thrown at the
same angle but below the horizontal. How long does it take for the
other egg to hit the ground after the one of the eggs hits the
ground?
Does the time difference between the eggs hitting the ground
depend...

A
ball is thrown from the roof of a building. The initial velocity
vector is at an angle of 53.0° above the horizontal. It is at
maximum height in 1.04 seconds. Express all vectors in terms of
unit vectors i and j. The ball strikes the ground at a horizontal
distance from the building of 33.1 meters.
a.) What is the vertical velocity (vector) at t=1.04
seconds?
b.) What is the initial vertical velocity (vector)?
c) What is the inital...

Please circle answers
1. A company that produces cell phones has a cost function of
C(x)=3x^2−1500x+39900 where C is cost in dollars and x is number of
cell phones produced (in thousands). How many units of cell phones
minimizes this cost function?
2. A ball is thrown into the air and its position is given by
h(t)=−4.9t^2+70t+5 where tt is measured in seconds and h(t) is
measured in meters above the ground. Find the height at which the
ball stops...

How do I solve this?
A ferris wheel is 35 meters in diameter and boarded from a
platform that is 2 meters above the ground. The six o'clock
position on the ferris wheel is level with the loading platform.
The wheel completes 1 full revolution in 4 minutes. The function h
= f(t) gives your height in meters above the ground t minutes after
the wheel begins to turn. Write an equation for h = f(t).

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