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3 years ago

7

8th grade math quiz i need help

1 answer:

coldgirl [10]3 years ago

4 0

Answer:

I don't have the answer to the first page but I do for the second.

Step-by-step explanation:

Use the Pythagorean theorem, A^2+B^2=c^2

2a. 13

2b. 15

2c. 50

2d. 4.5(Rounded to nearest tenth)

3. 10.8 ft

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RUDIKE [14]

Step-by-step explanation:

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3 years ago

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olya-2409 [2.1K]

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Step-by-step explanation:

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3 years ago

Two cups of flour are needed to make 24 oatmeal cookies. How many cups are needed to make... 4 dozen cookies? 6 dozen cookies? 1

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3 years ago

Read 2 more answers

A rocket is launched from atop a 104-foot cliff with an initial velocity of 110 ft/s. A. Substitute the values into the vertical

miv72 [106K]

Answer:

7.68 s

Step-by-step explanation:

The vertical motion formula is:

$h_{t} = h_{0} + v_{0}t - \frac{gt^{2}}{2}$

<u>Where:</u>

h(t): is the final height = 0

h(0): is the height of the cliff = 104 foot

v(0): is the initial velocity = 110 ft/s

g: is the gravity = 9.8 m/s² = 32.15 ft/s²

Hence, from the vertical motion formula we can find the time that will take the rocket to hit the ground:

$0 = 104 + 110*t - \frac{32.15t^{2}}{2}$

$0 = 104 + t(110 - 16.08t)$

We have two solutions:

t₁= -0.84 s

t₂ = 7.68 s

We will take the positive value, thus the time that will take the rocket to hit the ground is 7.68 s.

I hope it helps you!

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3 years ago