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inessss [21]
3 years ago
15

How to find the perimeter of a semicircle​

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

Answer: Formula: P=\frac{\pi d}{2}+d

Step-by-step explanation:

Formula: P=\frac{\pi d}{2}+d

Where;

P=perimeter\\\pi = pi (3.14)\\d= diameter\\

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Carl is drawing blueprints for a new building. Although the building will be 40 feet (480 inches) tall, his drawing is only 10 i
STatiana [176]

Answer:

48:1

Step-by-step explanation:

In this case we know the actual size and the size in the drawing therefore we can calculate its scale.

What we must do is divide the actual size by the size in the drawing. We know the actual size is 480 inches and in the drawing the size is 10 inches, so:

480/10 = 48

Which means that the relationship between the real and the drawing is 48:1

7 0
3 years ago
Classify as a constant, linear, quadratic, cubic or quartic and give the degree and leading coefficient of each of the following
Tpy6a [65]

Answer:

It's B I just did it

Step-by-step explanation:

8 0
3 years ago
Select the correct graph of the equation.
tatyana61 [14]

Answer:

A

Step-by-step explanation:

The -2 indicates that y would be -2; because A is the only option with that being true, we can eliminate all other potential options rather quickly.

I believe this is 3/5x-2 but please take pictures with all information in view so we can provide better answers!

5 0
2 years ago
Graph the inequality.<br> -9 less than or equal to y+ 5x less than or equal to 14
sukhopar [10]

Answer:rvfl

Step-by-step explanation:my computer is acting up sorry wrvob1

8 0
2 years ago
An observer stands 25 feet from the base of a flagpole and watches a flag being lowered at a rate of 5 ft/sec. Determine the rat
Sedaia [141]

Answer:

0.1 rad/s

Step-by-step explanation:

Since the distance from or to the flagpole is not given, I will assume. And my assumption is 50 ft

Now, the elevation angle A = 45 degrees, converting to radians, we have π/4 radians

Remember that the tan of an angle is OPP/HYP, and so

tan A = h/25, on differentiating, we have

d tan A/dA = sec^2 A = (1/25) dh/dA

Next, we have

25 sec^2 A * dA/dt= dh/dt = 5

Making dA/dt the subject of formula, we have

dA/dt = (1/5) cos^2 A

but cos^2 A from trigonometry = 1/2, this means that

dA/dt = .1 radians/second

If you want to convert to degrees, your have

.1 Rad/s( 180 deg/rad) = 18 degrees/second

3 0
3 years ago
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