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tatyana61 [14]
3 years ago
11

Will give brainliest & five stars!!

Mathematics
1 answer:
Arisa [49]3 years ago
6 0

Answer:

5.498 - C

Step-by-step explanation:

Length of an arc = tetha/360 × 2 × pi × r

Converting 7pi/4 to tetha

(7 × 180) / 4 = 315°, since pi = 180°

Plugging values to the formula:

315/360 × 2 × 3.142 × 1 = 5.498units

You might be interested in
A comic book store is having sale. You can buy 20 comic books for $35. What is cost of 8 comic books during the sale
san4es73 [151]

Answer:

The cost of 8 comic books is $14

Step-by-step explanation:

Given

20\ books = \$35

Required

Determine the cost of 8 books

First, we need to determine the cost of 1 book

20\ books = \$35

Divide through by 20

20\ books/20 = \$35/20

1\ book = \$35/20

1\ book = \$1.75

Then multiply both sides by 8 to get the cost of 8

8 * 1\ book = \$1.75 * 8

8 \ books = \$14

Hence;

<em>The cost of 8 comic books is $14</em>

7 0
3 years ago
240 is equal to w more than 369
poizon [28]

240=w+369

w = -129

(moving)

5 0
3 years ago
The following three shapes are based only on squares, semicircles, and quarter circles. Find the perimeter and the area of each
MakcuM [25]
The perimeter = 4 * length of a semicircle of radius 5 == 4*  pi * 5 =  20 pi cm



The area of one of the clear parts = 1/2 area of square - area semicircle

= 1/2 * 10^2  -  1/2 pi *5^2 = 50 - 12.5pi 

So area of shaded parts =  area of square -  4 (50 - 12.5pi)
 = 100 - 200 + 100pi = (100pi - 100) cm^2 
6 0
4 years ago
I will give brainliest
kramer

Answer:

7. The numbers 14/81 are relatively prime

8. b=3

9. 0.00001

19. 11

Step-by-step explanation:

7. Relatively prime numbers have no common factors. We only have to factor each number and compare

14=2*7

35=5*7

38=2*19

81=9*9

91=7*13

The first two numbers have 7 in common

The second have 2 in common

The third set have no common factors

The fourth set have 7 in common

The numbers 14/81 are relatively prime

8. b^{-3}=\frac{1}{27} => b^3=27 => b=\sqrt[3]{27} =3

9. 10^{-5}=\frac{1}{100000}=0.00001

10. 100,000,000,000=10*10*...10 as many times as zeroes there are, so

100,000,000,000=10^{11}

8 0
3 years ago
PLEASE HELP!!! I don't understand.
kiruha [24]

9514 1404 393

Answer:

  • arithmetic: 130
  • geometric: ±50

Step-by-step explanation:

<u>Arithmetic sequence</u>

The terms of an arithmetic sequence have common difference. If the missing term is x, then the difference between terms is the same:

  x -250 = 10 -x

  2x = 260 . . . . . . add 250+x to both sides

  x = 130 . . . . . . . . divide by 2

The missing term of an arithmetic sequence is 130.

(the common difference is -120)

__

<u>Geometric sequence</u>

The terms of a geometric sequence have a common ratio. If the missing term is x, then the ratios between terms are the same:

  x/250 = 10/x

  x^2 = 2500 . . . . . . . multiply both sides by 250x

  x = ±√2500 = ±50 . . . take the square root

The missing term of a geometric sequence is +50 or -50.

(the common ratio is ±1/5)

6 0
3 years ago
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