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3 years ago

Does doubling the radius of a sphere double the surface area? Explain your reasoning using an example.

Mathematics

1 answer:

Annette [7]3 years ago

5 0

Answer:

yes

Step-by-step explanation:

because area of sphere equals =

$4\pi \: r{2}$

so if we doubled the radius the surface area will be doubled

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For every 4 feet of fencing, the cost is $36 2 4 7. 10 8 36 81

stiv31 [10]

If your amount of fencing was 247.10 then you would divide that by 4 and multiply your result by 36 to find the amount of money needed to build a fence, your result is $2,196, now of course you have have more than 4 feet left but since the problem asks every 4 feet of fencing costs $36, I’m going to assume that if you have more than 4 but less than 8 you get that for free

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3 years ago

A living room rug has an area of 63 square feet. The width is 7 feet. What is the length ?

Orlov [11]

Answer:

lenght = 9

Step-by-step explanation: Area =L×W

Area = 63 7 . x= 63 x=63÷7 x=9 9×7=63

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3 years ago

What is an equation of the line that passes through the point (- 2, 7) and is perpendicular to the line x - 4y = 24 ? Pls help

Ray Of Light [21]

Answer: y=4x-1

Step-by-step explanation: the line goes through (-2,7) and is perpendicular to the line x-4y =24

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3 years ago

Negative 3 over 1 third plus 8 over 3 tenths

Katen [24]

The answer to your question is 7/5

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3 years ago

Find the value of c, rounded to the nearest tenth A. 11 B. 14.3 C. 37.6 D. 7.4

Helga [31]

Answer:

D. The correct value of c = 7.4

Step-by-step explanation:

According to Tangent-Secant theorem:

"When a tangent and a secant are drawn from one single external point to a circle, square of the length of tangent segment must be equal to the product of lengths of whole secant segment and the exterior portion of secant segment."

Here, the external length of tangent segment = 10

Also, the length of internal segment is 14 and c.

So, by the SECANT THEOREM:

$(10)^2 = 14 \times c\\\implies c = \frac{100}{14} = 7.14$

or, c = 7. 1428

Now, rounding off the value of c = 7. 14 to the nearest tenth, we get

c = 7. 4

Hence the correct value of c = 7.4

8 0

3 years ago

Read 2 more answers