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3 years ago

The radius of a circle was increased by 25 percent. By what percent did the area of the circle increase?

Mathematics

1 answer:

Mrac [35]3 years ago

8 0

the area would increase by 56.25%

the new radius would be 1.25 the length of the original radius, you would then need to square it and subtract the original

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Find the area of the shaded region!<br>please solve this with solutions !ASAP

bija089 [108]

the area of the shaded part is 30. 89 cm²

<h3>How to determine the area</h3>

We have the shape to be a rectangle

The area of the shaded part should be;

Area of rectangle - 2 ( area of a semi circle)

The formula for area of a rectangle

Area = length × width

Area = 12 × 12

Area = 144 cm²

Area of a semicircle = 1/2 πr²

Area = 1/ 2 × 3. 142 × 6²

Area = 56. 56 cm²

Area of shaded part = area of rectangle - 2( area of semicircle)

Area of shaded part = 144 - 2(56. 56)

Area of shaded part = 144 - 113. 11

Area of shaded part = 30. 89 cm²

Thus, the area of the shaded part is 30. 89 cm²

Learn more about area here:

brainly.com/question/14137384

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3 0

2 years ago

Mr.Giarmo left for work at 7:15 A.M. Twenty-five minutes later ,he arrived at his work .What time did Mr. Giarmo arrive at his w

GuDViN [60]

All you have to do is add 25 to 15.

25+15=40

So, the time he arrives at work is at 7:40 AM.

4 0

4 years ago

Read 2 more answers

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Lerok [7]

Answer:

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Step-by-step explanation:

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3 0

4 years ago

Graph the six terms of a finite sequence where a1= -10 and d=3

zlopas [31]

I'm assuming your problem is about an arithmetic sequence, with first term equal to -10 and a common difference of 3 (meaning add 3 to a term to get the next term.

The first six terms are -10, -7, -4, -1, 2, 5.

To make a graph, plot points (1, -10), (2, -7), (3, -4), (4, -1), (5, 2), and (6, 5). See the attached picture. The points go steadily uphill, in a straight line. Any arithmetic sequence with a positive common difference will do just that!

Hope this helps!

8 0

3 years ago

(4x2−2x+28)+(4x2+4x−55)

Nostrana [21]

Answer:

$\boxed{ \bold{ \boxed{ \sf{8 {x}^{2} + 2x - 27}}}}$

Step-by-step explanation:

$\sf{(4 {x}^{2} - 2x + 28) + (4 {x}^{2} + 4x - 55)}$

When there is a ( + ) in front of an parentheses in an expression, there is no need to change the sign of each term in the expression. That means , the expression remains the same. Just, remove the unnecessary parentheses

$\dashrightarrow{ \sf{4 {x}^{2} - 2x + 28 + 4 {x}^{2} + 4x - 55}}$

Collect like terms and simplify

$\dashrightarrow{ \sf{4 {x}^{2} + 4 {x}^{2} - 2x + 4x + 28 - 55}}$

$\dashrightarrow{ \sf{8 {x}^{2} + 2x + 28 - 55}}$

The negative and positive integers are always subtracted but possess the sign of the bigger integer.

$\dashrightarrow{ \sf{8 {x}^{2} + 2x - 27}}$

Hope I helped!

Best regards! :D

5 0

3 years ago