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riadik2000 [5.3K]
2 years ago
7

A ball is launched into the sky at 54.4 feet per second from a 268.8 meter tall building. The equation for the ball’s height, h,

at time t seconds is h = -3.2t^2 + 54.4t + 268.8. When will the ball strike the ground?
Mathematics
2 answers:
pychu [463]2 years ago
8 0

Answer:

4.42 seconds is the correct answer

Step-by-step explanation:

worty [1.4K]2 years ago
5 0

Answer:

7.41

Step-by-step explanation:

Vertical component:

S = 268.8

U = 0

V =?

A = 9.8

T=?

S = ut + 0.5at^2. u = 0

268.8 = 0.5x9. 8xt^2

T = 7.41 seconds

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Natasha2012 [34]

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{:\implies \quad \sf \{2-(-1)\}^{2}+(9-5)^{2}=r^{2}}

{:\implies \quad \sf (3)^{2}+(4)^{2}=r^{2}}

{:\implies \quad \sf 9+16=r^{2}}

After raising ½ power to both sides , we will get <em>r = +5 , -5</em> , but as radius can never be -<em>ve</em> . So <em>r = +</em><em>5</em><em> </em>

Now , putting values in our standard equation ;

{:\implies \quad \sf \{x-(-1)\}^{2}+(y-5)^{2}=(5)^{2}}

{:\implies \quad \bf \therefore \quad \underline{\underline{(x+1)^{2}+(y-5)^{2}=25}}}

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Refer to the attachment as well !

8 0
2 years ago
Atul deposited 30% of his income in a bank. After spending 50% of the remaining ,he had ripped 10,500 left with
Alex Ar [27]

Answer:

30,000

Step-by-step explanation:

50% remaining = 10500

After deposit: 2×10500 = 21000

210000 : 70%

X : 100%

21000/70 = X/100

X = 30,000

6 0
3 years ago
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m_a_m_a [10]
Vertical reflection over the x-axis, shrink of 1/3, right 3, up 2
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2 years ago
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Luden [163]

Answer:

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Step-by-step explanation:

Given data

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The expression for the volume of a pyramid is

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substitute

V= 1.2^2* 2.8/3

V= 1.44*2.8/3

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V= 1.34cubic units

5 0
2 years ago
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Vitek1552 [10]

Answer:

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