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Mila [183]
3 years ago
14

Answer these three question from what you see

Mathematics
1 answer:
anastassius [24]3 years ago
8 0
The answer to this question would be a cylinder
Hope i helped! 
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the initial vertical velocity of a rocket shot straight up is 42 meters per second. How long does it take for the rocket to retu
Snowcat [4.5K]
It takes 4.3 seconds for the rocket to return to earth.

The equation is:
0=-9.8t^2+v_0t+h_0
where -9.8m/sec² is the acceleration due to gravity, v₀ is the initial velocity, and h₀ is the initial height.  We will go from the assumption that the rocket is launched from the ground, so h₀=0, and we are told that the initial velocity, v₀, is 42.  This gives us:

0=-9.8t^2+42t

We will use the quadratic formula to solve this.  The quadratic formula is:
x=\frac{-b\pm \sqrt{b^2-4ac}}{2a}

Plugging in our information we have:
t=\frac{-42\pm \sqrt{42^2-4(-9.8)(0)}}{2(-9.8)}
\\
\\=\frac{-42\pm \sqrt{1764-0}}{-19.6}
\\
\\=\frac{-42\pm \sqrt{1764}}{-19.6}
\\
\\=\frac{-42\pm 42}{-19.6}=\frac{-42-42}{-19.6} \text{ or } \frac{-42+42}{-19.6}
\\
\\=\frac{-84}{-19.6}\text{ or }\frac{0}{-19.6}
\\
\\=4.3\text{ or }0

x=0 is when the rocket is launched; x=4.3 is when the rocket lands.
8 0
3 years ago
the distance from the earth to the sun is about 93,000,000 miles. how many pennies would it take to make a stack that high? plss
Sergio039 [100]
Well first find out how big a penny is then divide that by 93,000,000
4 0
1 year ago
Read 2 more answers
Solve the equation-3x+25 = 40, we want to know the value of x
Mariulka [41]

Answer:

Last option: x = -5

Step-by-step explanation:

-3x + 25 = 40

-3x = 40 - 25

-3x = 15

3x = -15

x = -5

6 0
2 years ago
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Square root of 20200
Anastasy [175]

Answer:

11

Step-by-step explanation:

7 0
3 years ago
Giving brainliest for help plz
Kryger [21]

Answer is B.

Thanks!!

5 0
3 years ago
Read 2 more answers
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