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jasenka [17]
3 years ago
5

The height of a ball thrown directly up with a velocity of 10 feet per second from a initial height of of 100 feet is given by t

he equation , where t is the time in seconds and h is the ball’s height, measured in feet. When will the ball hit the ground? Round your answer to the nearest tenth.

Mathematics
1 answer:
Artemon [7]3 years ago
4 0

Answer:

2.8 seconds

Step-by-step explanation:

Given that a ball is thrown directly up

Initial velocity u = 10 ft/sec INitial height = 100 ft

t = time from time of throw

The equation as

h(t) =-16t^2+10t+100

Since h(0) =100 we find that h is measured from earth

When the ball hits the ground h=0

So we have

h(t)=0 =-16t^2+10t+100

Use binomial formulae to solve this to get

t=2.832 or t =-2.207

Since time cannot be negative

we get t=2.832

At 2.8 seconds ball hits the ground


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kirza4 [7]

Answer:

-1

Step-by-step explanation:

A function is represented by the following symbol f(x) where f(x) further represents y like this ,

y=f(x)

so in this question they are asking what is f(5) which means when the value of x is 5 what is the value of y?

We can see in the graph when x = 5 the value of y is -1 to be exact so

f(5) = -1

or

y=f(x)\\-1 = f(5)\\

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3 years ago
Independent Practice
schepotkina [342]

Answer:

C.

343 fourths

Step-by-step explanation:

C.

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6 0
2 years ago
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Aneli [31]

Answer:

Step-by-step explanation:

1) 2x -y = 1 -------1

3x - y = -6 ------2

Subtract eqn 2 from eqn 1

-x = 1--6 = 7

x = -7

Put x= -7 in eqn 1

2*-7-y = 1

-14-y = 1

- y = 15

y = -15

2) 4x +2y = 10------1

y = 4x + 2--------2

Put eqn 2 in eqn 1

4x + 2 ( 4x+ 2) = 10

4x + 8x + 4 = 10

12x = 6

x = 6/12 = 1/2

Put x = 1/2 in eqn 2

y = 4* 1/2 + 2= 2 + 2

= 4

3) 6x - y = 2------1

y = 3x + 4---------2

Put eqn 2 in eqn 1

6x - (3x +4) = 2

6x - 3x - 4 = 2

3x = 6

x = 2

y = 3*2 + 4 = 6 + 4

= 10

6 0
3 years ago
A regular workweek is 40 hours. Overtime pay is time and one-half): Manual is a word-processor operator. He makes $13.50 an hour
pychu [463]
Overtime is over 40 so subtract 40 from 54 and get
54-40=14
14 hours hovertime
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(13.5 times 40)+(13.5 times 1.5 times 14)=
540+283.5=823.5
answer is $823.50

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3 years ago
Cora chose to have her birthday party
kramer

$35, sorry if I’m wrong

6 0
3 years ago
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