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BabaBlast [244]
3 years ago
13

Can somebody help me?

Mathematics
1 answer:
Amanda [17]3 years ago
5 0

The area of the shaded region is 423.9 sq in.

Step-by-step explanation:

Given,

The radius(r) of inner circle = 11 in

The radius(R) of the outer circle = 16 in

To find the area of the shaded  region.

Formula

The area of a circle of radius r is πr²

Now,

The area of the inner circle = 3.14×11² sq in = 379.94 sq in

The area of the inner circle = 3.14×16² sq in = 803.84 sq in

The area of the shaded region = (803.84-379.94) sq in = 423.9 sq in

Hence,

The area of the shaded region is 423.9 sq in.

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kirill115 [55]

Answer:

P(F | C) = 0.96

Step-by-step explanation:

Hi!

This is a problem on conditional probability. Lets call:

C = { cloudy day }

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You are asked for P(F | C), the probability of a day being foggy given it is cloudy. By definition:

P(F|C)=\frac{P(F\bigcap C)}{P(C)}

And the data you have is:

P(C) = 0.57\\P(F \bigcap C) =0.55

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3 years ago
If 2 cubic feet of sand weigh 90 pounds, how much do 5 cubic feet of sand weigh? what is the actual answer
nasty-shy [4]

Answer:

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It is much easier if you use the unit rate, so we'll convert the first senta\ence into a ratio. 2 cubic feet:90lb. you need to get 1 cubic foot, so divide both sides my 2, 1 cubic foot:35 pounds. now, to get five cubic pounds(See where this is going?) you multiply both sides by 5.  5 cubic feet:175lb

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A rhino can run 28 miles per hour. What is that speed in feet per second, to the nearest whole number?
Mrrafil [7]

Answer:

A rhino runs at a speed of about 28 miles per hour.

We need to determine the speed in feet per second.

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The miles can be converted to feet by multiplying 5280 with 28 miles per hour.

Thus, we have;

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Thus, the speed of the rhino in feet per hour is 147840

Converting hours to seconds:

The hours can be converted into seconds by dividing 147840 by 3600 (Because an hour has 60 seconds in a minute and 60 minutes in an hour)

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