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Studentka2010 [4]
3 years ago
9

Find the exact circumference of a circle with the given radius.

Mathematics
1 answer:
11Alexandr11 [23.1K]3 years ago
3 0

Answer:

6.5\pi\ in

Step-by-step explanation:

we know that

The circumference of a circle is equal to

C=2\pi r

we have

r=3\frac{1}{4}\ in

Convert to an improper fraction

r=3\frac{1}{4}=\frac{3*4+1}{4}=\frac{13}{4}\ in

substitute

C=2\pi(\frac{13}{4})

C=\frac{13}{2}\pi=6.5\pi\ in

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Someone help me pls
Wittaler [7]

Answer:

y=1/2x + 3

Step-by-step explanation:

The first thing you need to know is that the slope of a perpendicular line is the opposite reciprocal of the other slope. Find the slope of this line, which is -2. The opposite reciprocal is 1/2. So, you know that the perpendicular line is equal to y=1/2x. Plug the x coordinate (4) in for x to have: y=1/2(4). Multiply 4 by 1/2 to get y=2. Since the y coordinate is supposed to equal 5, add 3 to y=2 to get 5. Since 3 is the amount we added, thats where the y intercept will be. Hope this helped!

5 0
3 years ago
ANSWER ASAP PLZZ three times William's age, w, is less than his cousin Sandra's age, 15. On the number line below, select from t
Eva8 [605]

Answer:

w = 13, 11, 12

Step-by-step explanation:

3 (15 - w)

3 (15 - 13)

3 (2)

w = 6

___

3 (15 - x)

3 (15 - 11)

3 (4)

w = 12

___

3 (15 - x)

3 (15 - 12)

3 (3)

w = 9

(hope this helps!)

8 0
3 years ago
In triangle VWX, side VW and side XV are congruent and the measure of X is 19 degrees. What is the measure of angle V?
Alchen [17]

Answer:

80.5°

Step-by-step explanation:

Every triangle is measured to be 180°. Subtract X which is 19 from 180

180-19=161

Because V and W are congruent, they are the same length. So you divide 161 by w to get 80.5

4 0
3 years ago
What is 3/4 minus 3/8 in simplest form
Maslowich
Go to cymath and type it in and it will work it out for you and tell you the answer
3 0
3 years ago
Noah and Lin are marketing paper cones to hold popcorn to hand out at parent math night. They want the cones to hold 9 cubic inc
Vadim26 [7]

Answer: r = 1.69 inches

              h = 2.15 inches

Step-by-step explanation: Volume of a solid is the amount of space contained within a solid.

Volume of a cone is directly proportional to radius and height:

V=\frac{1}{3}\pi r^{2}h

They want the cones to hold the same volume of 9 cubic inches.

If height is 3:

9=\frac{1}{3}\pi r^{2}3

\pi r^{2}=9

r^{2}=2.864

r = 1.69 inches

When height is 3, radius is 1.69 inches for a cone to have 9 cubic inches of volume.

If radius is 2:

9=\frac{1}{3}\pi (2)^{2}h

h=\frac{9(3)}{4 \pi}

h = 2.15 inches

If radius is 2 inches, height of the cone is 2.15 inches.

6 0
3 years ago
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