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3 years ago

Can someone answer this question please answer it correctly if it’s corecct I will mark you brainliest please help me please

Mathematics

2 answers:

Anon25 [30]3 years ago

4 0

Answer:

First you find the radius R

We have, circumference = 2*3.14*R = 31.4

=> R =31.4/(2*3.14) =5

We have , area = 3.14*R^2 = 3.14*5^2 = 78.5

Step-by-step explanation:

Here we use pi =3.14.

Inga [223]3 years ago

3 0

Answer:

78.5 units²

Step-by-step explanation:

The circumference of a circle is denoted by: C = 2πr, where r is the radius. Here, we know that C = 31.4, so plug that in for C:

C = 2πr

31.4 = 2πr

2r = 9.99

r = 5.00 units

The area of a circle is denoted by: A = πr², where r is the radius. Here, we found r, so plug that in:

A = πr²

A = π * 5.00² ≈ 78.5 units²

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leonid [27]

Answer:

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Step-by-step answer:

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3 years ago

Drew invests $70.00. It earns 50% interest annually.

VladimirAG [237]

Step-by-step explanation:

50% interest annually.

that means he gets 50% interest of the invested capital every year.

and that means he gets 50% of $70 in one year.

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1 year ago

The size of angle aob is equal to 132 degrees and the size of angle cod is equal to 141 degrees. find the size of angle dob.

Varvara68 [4.7K]

angle AOB = 132 and is also the sum of angles AOD and DOB. Hence
angle AOD + angle DOB = 132°    ---> 1

angle COD = 141 and is also the sum of angles COB and BOD. Hence
angle COB + angle DOB = 141°    ---> 2

Now we add the left sides together and the right sides of equations 1 and 2 together to form a new equation.

angle AOD + angle DOB + angle COB + angle DOB = 132 + 141       ---> 3

We should also note that:
angle AOD + angle DOB + angle COB = 180°

Therefore substituting angle AOD + angle DOB + angle COB in equation 3 by 180 and solving for angle DOB:
180 + angle DOB = 132 + 141
angle DOB = 273 - 180 = 93°

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3 years ago

Robbie, has scored 120 so far this season. He has scored all of his points on 1-point extra point kicks and 3-point field goals.

joja [24]

Answer:

39 and 27

Step-by-step explanation:

GIVEN: Robbie, has scored $120$ so far this season. He has scored all of his points on $1$ -point extra point kicks and $3$ -point field goals. He has made a total of $66$ kicks.