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densk [106]
3 years ago
7

In science class, the students were asked to create a container to hold an egg. they would then drop this container from a windo

w 25 feet above the ground. the equation h= -16t^2 + 25, give the containers height H after T seconds.
a. find the maximum height of he container.


b. how many seconds will it take for the container to reach the ground?

(if possible please show steps) ​
Mathematics
1 answer:
Rufina [12.5K]3 years ago
6 0

Answer:

t=√

−1

16

h+

25

16

Step-by-step explanation:

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I need help with this question
MrMuchimi
Part a:
this is really just intuition. you can go either way as long as you back up what you say.
either you think hunter would be faster because he starts out with a lot more money, or you think amado would be faster because he earns a lot more.

part b:
let x be the number of hours hunter works, and y the number that amado works.
they both need to earn 600 dollars.

hunter's money is modelled by 150 + 7.5x
to get 600 dollars
150 + 7.5x = 600
7.5x = 450
x = 60

amado's money is modelled by 12y
to get 600 dollars
12y = 600
y = 50

hunter would need to work 60 hours to make enough money, but amado would only need to work 50, so hunter will take longer.

then say whether this agrees with what you guessed in part a
6 0
3 years ago
Explain how to find 40 x 50 using mental math
Blababa [14]
40 * 50= 2,000

Easy way to find this out!

4*5=20.

You take the 0 from 40 and the 0 from 50 and you have 

20 +0 zeros.

2000 which is 2,000!
7 0
3 years ago
Read 2 more answers
Solve the system using substitution: y + 8x = 10 and 2y - 4x = 40
exis [7]

Answer:

Hence x = -1 and y = 18

<em></em>

Step-by-step explanation:

Given the system of equations

y + 8x = 10... 1

2y - 4x = 40 ... 2

From 1; y = 10-8x

Substitute into 2;

2(10-8x) - 4x = 40

20 - 16x - 4x = 40

20 - 20x = 40

-20x = 40 - 20

-20x = 20

x = -1

Recall that y = 10-8x

y = 10 - 8(-1)

y = 10 + 8

y = 18

Hence x = -1 and y = 18

<em></em>

4 0
3 years ago
It's possible to build a triangle with side lengths of 3.3, and 9<br> A. True<br> B. False
mario62 [17]
True it is possible to built a triangle with 3.3 and 9. Two long we sides would be 9 and the bottom side would be 3
4 0
2 years ago
A skate ramp is 4.2 meters long. It rises up 1.7 meters. What’s is the angle of elevation to the nearest tenth of a degree?
Kipish [7]
Θ
=
arcsin
(
.7
4.2
)
≈
10
∘
Explanation:
We view the ramp as a right triangle. The hypotenuse is 4.2 and the vertical side .7, which is opposite the angle
θ
we seek.
sin
θ
=
.7
4.2
=
1
6
I'm going to finish the problem but I'll note if we were actually building the ramp we don't need to know the angle; this sine is sufficient.
θ
=
arcsin
(
1
6
)
θ
≈
10
∘
which I think is a pretty steep ramp for a wheelchair.
There will be another inverse sine that is the supplementary angle, around
170
∘
, but we can rule that out as a value for a ramp wedge angle.
4 0
2 years ago
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