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VikaD [51]
2 years ago
13

HELP NEEDED!

Mathematics
1 answer:
SOVA2 [1]2 years ago
5 0

Answer:

10000\pi

Step-by-step explanation:

The formula for circumference is given by 2\pi r. Setting this equal to the circumference in the problem, we can find the radius of the sphere:

2\pi r=100\pi, \\r=\frac{100\pi}{2\pi},\\r=50

Now we can use the formula for the surface area of a sphere:

Surface area of a sphere: A=4\pi r^2

Using r=50:

A=4\cdot \pi \cdot 50^2,\\A=4\cdot 2500\cdot \pi,\\A=\boxed{10000\pi}

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Ulleksa [173]
44 because 105 ÷ 7 = 15.
So (7*2)+(15*2)=44
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3 years ago
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Cends 36 feet in 2 seconds. Express the rate of the​ parachutist's change in height as a unit rate.
djverab [1.8K]

Answer: 18 ft per second

Step-by-step explanation: 36 divided by 2

5 0
2 years ago
Train a is traveling at 30 mph faster than train b. If train a travels 350 miles in the same amount of time that train b travels
GalinKa [24]

Answer:

20 mph

Step-by-step explanation:

Let speed of Train a = Va mph

Let speed of Train b = Vb mph

Va = Vb + 30

Let time taken for Train a = Ta

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time taken = distance travelled/speed

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Tb = 140/Vb

But they both travel in the same amount of time.

So, Ta = Tb

\frac{350}{v_{b} + 30}=\frac{140}{v_{b}}

Cross multiply

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Divide both sides by 210

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4 0
2 years ago
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Kaylis [27]

Answer:

length of BC = 5 1/4 feet

Step-by-step explanation:

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Area of a triangle = 1/2×base×height

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Height = 35/8 ÷ 5/6

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= 5 1/4 feet

Height = BC = 5 1/4 feet

length of BC = 5 1/4 feet

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3 years ago
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Alexxandr [17]

Answer

Step-by-step explanation:

8 0
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