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Harlamova29_29 [7]
3 years ago
5

If a radius of a sphere is divided by 2, will the surface area be divided by 2?

Mathematics
2 answers:
olganol [36]3 years ago
8 0
If r is the radius of a sphere its surface area = 4(pi)r^2.

If the radius is doubled then its surface area = 4(pi)(2r)^2 = 4*4(pi)r^2.

So the surface area becomes 4-fold or the increase in surface area is 300%.
Reptile [31]3 years ago
7 0
· Author has 32K answers and 17.9M answer views
If r is the radius of a sphere its surface area = 4(pi)r^2.

If the radius is doubled then its surface area = 4(pi)(2r)^2 = 4*4(pi)r^2.

So the surface area becomes 4-fold or the increase in surface area is 300%.
8.4K viewsView 1 Upvoter
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<span>we have that

H(t) = −16t</span>²<span> + 96t + 80
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Part A)
see the attached table
</span><span>the solution to H(t) = g(t) is between t=4 sec and t=5 sec
for t=4 sec
H(4)=208 ft   and g(4)=159.8 ft
so
H(t) > g(t)

 </span>for t=5 sec
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<span>that change of H(t) from being greater to becoming smaller tells me that the solution is in that interval [4, 5]
</span>
Part B)<span>Explain what the solution from Part A means in the context of the problem
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using a graph tool
see the attached figure

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