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Feliz [49]
3 years ago
13

8% of 50 to the nearest tenth

Mathematics
1 answer:
mr_godi [17]3 years ago
5 0
8% of 50 is 4 thus 0 rounded to the nearest tenth 

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A ball is thrown vertically in the air with a velocity of 90ft/s. Use the projectile formula h=−16t2+v0t to determine at what ti
Debora [2.8K]

Answer:

t=1.7 \ sec\ , t=4.0\ sec

Step-by-step explanation:

<u>Vertical Throw</u>

It refers to a situation where an object is thrown verticaly upwards with some inicial speed v_o and let in free air (no friction) until it completes its movement up and finally returns to the very same point of lauch. The only acting force is gravity

The projectile formula is given as

h=-16t^2+v_0t

where t is time in seconds, h is the height in feet and v is the speed in ft/sec

We are required to find the time t where h=120 ft, knowing v_o=90\ ft/sec

-16t^2+90t=120

Rearranging

-16t^2+90t-120=0

This is a second-degree equation which will be solved with the formula

\displaystyle x=\frac{-b\pm \sqrt{b^2-4ac}}{2a}

\displaystyle x=\frac{-90\pm \sqrt{90^2-4(-16)(-120)}}{2(-16)}

\displaystyle x=\frac{-90\pm \sqrt{1380}}{-32}

Two solutions are obtained

\boxed{t=1.7 \ sec\ , t= 4.\ sec}

Both solutions are possible because the ball actually is at 120 ft in its way up and then when going down

6 0
4 years ago
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The slop is -1 and the y-intercept is (0,7) so then go on the graph and plot a point on the y- axis line at 7. Then go right 7 units and down 7 units and that should be it :)
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3 years ago
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Annie has 385 flowers she has 238 less than Zoe how many flowers does Zoe have
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Answer:

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Step-by-step explanation:

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NEED HELP WILL MARK BRAINLIEST
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its b, hope this helps.

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ws

Step-by-step explanation:

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