A circle has an area of approx. 78.5 square units. If the center of the circle is at (2,4). Which of the following points is on the circle?

Question

A. (-6,4)
B. (2,-1)
C. (-4,-4)
D.(2,-9) ********

My thoughts are D - can you please check it...thanks

Answer 1

78.5 = 25π, so r=5
(2-2)^2 + (-9-4)^2 = 13^2, so D is wrong

(A) (-6-2)^2 + (4-4)^2 = 64, so nope
(B) (2-2)^2 + (-1-4)^2 = 25 we have a winner
you can check (C) if you want.

Answer 2

okay I understand now...thank you

Answer 3

the answer is actually b, (2,-1)

Answer 4

I dont get this

Answer 5

17x31=?

Answer 6

C
A
C
B
A
D
B
C
A
B
If any is wrong I am sorry! Hope this helps!

Answer 7

1.b
2.b
3.c
4.b
5.c
6.d
7.b
8.d
9.a
10.c
Hope this helps

Answer 8

10/10 worked for me (conexus) thanks man

Answer 9

Anonymous is right it is
1 b
2 b
3 c
4 b
5 c
6 d
7 b
8 d
9 a
10 c
I got an 80% on it but I reviewed it and I got the answers
hope this helps good luck

Answer 10

Anonymous is right 10 is C