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ella [17]
3 years ago
7

Find the area of a circle with the diameter of 3 centimeters. Use 3.14 for pi

Mathematics
1 answer:
Ket [755]3 years ago
3 0
The equation for the area of circle is:
A =  \pi  r^{2}
where r = radius.

The radius of a circle is 1/2 its diameter. Since you know the diameter is 3cm, its radius must be 3cm/2 = 1.5cm. 

Now just plug r=1.5 into the equation for the area of the circle to find the area:
A = \pi r^{2}
A = \pi (1.5)^{2}
A = 7.07 cm^{2}

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A manpaid rs 510 as income tax when it was 5 paisa per rupee what was his income?
Goshia [24]

The income of the man in discuss as in the task content is; rs 10,200.

<h3>What is the income of the man?</h3>

Since, it follows that 100 paisas make one rupee. This insinuates that the income tax rate which corresponds to 5 paisa per rupee is; 5%.

Hence, the amount earned by the man in discuss can be evaluated as follows;

(5/100) × Income = 510

Hence, Income = 510/0.05 = rs 10,200.

Read more on percentages;

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2 years ago
Ariel snowboarded down a mountain that has a vertical height of 1,200 feet. She traveled a distance of 2,400 feet from the top o
erica [24]
The angle of elavation would be 45°, this is because straight up would be represented by 180°, and 90°, would remain as 1200 ft traveled, and half of 90°, is 45° which would double the distance traveled
5 0
3 years ago
Why do you multiply by a power of 10 when writing a repeating decimal as a rational number
oee [108]

The idea is to shift the number enough so that you can cancel the repeating digits by subtraction.

_____

Example

0.181818_18 multiplied by 100 gives

18.181818_18

Subtracting the original number gives

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When you multiply by 100 and subtract 1 times the original, you have multiplied by 99. Thus the value of the original number is 18/99 or 2/11.

4 0
3 years ago
(3x + 5)<br> (10x - 7)º
ella [17]

Answer:

180 i think but idrk

Step-by-step explanation:

8 0
3 years ago
For the given angle measure, find the measure of a supplementary angle and the measure of a complementary angle, if possible. If
8090 [49]

Answer:

A complementary angle is 63 degrees and supplementary angle is 153 degrees.

Step-by-step explanation:

Complementary angle:

A complementary angle adds up to 90 degrees, so you have to subtract 27 from 90.  90-27=63

Supplementary angle:

A supplementary angle adds up to 180 degrees, so you have to subtract 27 from 180. 180-27=153

6 0
3 years ago
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