How do you find the surface area of a circle?

Answers

Answer 1

Answer:

πr²

Step-by-step explanation:

The surface area of a circle is πr²

Pie is 22/7 or 3.14

While the radius of a circle is any line from the centre of a circle to any part of the circumference of the circle. A diameter is any line that cuts the circle into two equal halves, cutting the circle from the centre.

To get the surface area of a circle, you draw a line from the centre of the circle, and then touch any part of the circumference of the circle. Then you measure the line, that's the radius.

If for instance, the radius gives 7cm, you find the Square, And then multiply it with pie.

22/7 X 7 ²

22/7 X 7 X 7

22 X 7

154cm²

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What is the circumference of a circle with a radius of 2.5 meters?A.
15.7 meters

B.
19.63 meters

C.
78.5 meters

D.
81 meters

Answers

Answer: A.15.7 meters

Step-by-step explanation:

The answer is A. 15.7 meters

Jerry has 61 percent on khan. She needs to get 100 percent in one week. How much percent should she get each night to reach her goal of 100%??????????.

Answers

Answer:

She would need to complete 5.57 each noght to reach her goal of 100%.

Step-by-step explanation:

39/7 is equal to 5.57

Y=x/3
What is the constant of proportionality?

Answers

can I have the brainliest

y = 1/3 x
the constant of proportionality is 1/3 or 0.3333333333

1/3 is the constant of proportionality?

Only problem 6a. Can someone demonstrate how to do this so I can do the rest solo?

Answers

as far as I can tell, is simply asking to write two more expressions, that are equivalent to the provided one, namely, grab the provided one and expand it, if you simplify the expanded version, you'd end up with the provided, for example

$\bf \boxed{6a.1}~\hfill \stackrel{changing}{\cfrac{29\cdot 3}{30\cdot 3}}\implies \stackrel{one}{\cfrac{87}{90}}~\hfill \stackrel{changing}{\cfrac{29\cdot 7}{30\cdot 7}}\implies \stackrel{t wo}{\cfrac{203}{210}}\n\n\n\boxed{6a.3}~\hfill \stackrel{ch anging}{\cfrac{15/ 3}{30/ 3}}\implies \stackrel{one}{\cfrac{5}{10}}~\hfill \stackrel{changing}{\cfrac{15/ 5}{30/ 5}}\implies \stackrel{two}{\cfrac{3}{6}}$

so let's do 6a1, 6a3 and 6a5.

$\bf \boxed{6a.1}~\hfill \stackrel{changing}{\cfrac{29\cdot 3}{30\cdot 3}}\implies \stackrel{one}{\cfrac{87}{90}}~\hfill \stackrel{changing}{\cfrac{29\cdot 7}{30\cdot 7}}\implies \stackrel{t wo}{\cfrac{203}{210}} \n\n\n \boxed{6a.3}~\hfill \stackrel{changing}{\cfrac{15/ 3}{30/ 3}}\implies \stackrel{one}{\cfrac{5}{10}}~\hfill \stackrel{changing}{\cfrac{15/ 5}{30/ 5}}\implies \stackrel{two}{\cfrac{3}{6}}$

$\bf \boxed{6a.5}~\hfill \stackrel{changing}{(9\cdot 10)/ (2\cdot 10)}\implies \stackrel{one}{90/ 20}~\hfill \stackrel{changing}{(9\cdot 70)/(2\cdot 70)}\implies \stackrel{two}{630/ 140}$

PLEASE HELP what's the unit price!!!!!!!! For number 1,2,4 please!!!!!!!!!!!!!

Answers

1. 3 cans of cat food for $0.85

This is really simple division once looked at (I took the decimal out of the equation, so I will add it back later):

85/3=28.333…

Since it can't be rounded, it remains as 28, which means that the correct answer is $0.28/can of cat food, once the decimal placement has been refactored.

2. 14 ounces of Olive Oil for $3.59.

359/14=25.642

Since this term is able to be rounded, it becomes 26, since we're rounding to two numbers. Now, we put the decimal back where it was taken out earlier, and we learn that the answer is $0.26/ounce of Olive Oil.

4. 4 pairs of socks for $11.00.

1100/4= 275

This time, there is nothing to round, so after the decimal has been put back in its original spot, the answer becomes $2.75/pair of socks.

6.91 x 2.3 = what. please show work

Answers

15.893 is the answer.

the answer is 15.893

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