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zavuch27 [327]
3 years ago
8

PLEASE HELP! IM BEING TIMES!!!!!!!

Mathematics
1 answer:
Paul [167]3 years ago
6 0

Answer:

Answer is D.

Step-by-step explanation:

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The height 'h' (in feet) of a ball in a baseball game can be modeled by h = -16t² + 28t + 8 , where 't' is the time (in seconds)
lidiya [134]

Answer:

  a)  No. t < 0 is not part of the useful domain of the function

  b) 2.0 seconds

Step-by-step explanation:

a) A graph of the function is shown below. It shows t-intercepts at t=-0.25 and t=2.0. We presume that t is measured forward from some event such as the ball being thrown or hit. The model's predicted ball location has no meaning prior to that event, when values of t are negative.

__

b) It is convenient to use a graphing calculator to find the t-intercepts. Or, the equation can be solved for h=0 any of several ways algebraically. One is by factoring.

  h = 0 = -16t² +28t +8 . . . . . . . . . . . . the ball hits the ground when h = 0

  0 = -4(4t² -7t -2) = -4(4t +1)(t -2)

This has t-intercepts where the factors are zero, at t=-1/4 and t=2.

The ball will hit the ground after 2 seconds.

4 0
3 years ago
5. Evaluate<br><br> 10+ (4 23 + 7) - 19<br> A. 30<br> B. 33<br> C. 47<br> D. 45
Lyrx [107]

Answer:

10+ (4 23 + 7) - 19

I don't know if the 4 is supposed to be multiple or subtract or to add but If it is add

4 0
2 years ago
A circle is cut from a square piece of cloth, as shown.
ziro4ka [17]

Answer:

area of a circle= πr²

= 3.14×18×18×

=1017.36 in²

8 0
3 years ago
What is 50 percent of 62?
stepan [7]

Answer:

31

Step-by-step explanation:

An entire amount is 100% of the amount.

50% is half of 100%, so 50% means the same as half.

Half of 62 is the same as 62/2 = 31

Answer: 31

6 0
3 years ago
Read 2 more answers
A triangle has sides with lengths of 7 feet 17 feet and 20 feet is it a right triangle?
natali 33 [55]

Answer:

This is not a right triangle because 7^2 + 17^2 does not equal 20^2

Step-by-step explanation:

6 0
2 years ago
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