The expression A is equivalent to 28+7
7 times 4 equals 28 7 times 1 is 7
28+7
The area of a circle is given by
And the radius is half the diameter:
So, you have

which evaluates to 572.5566
Answer:
A
Step-by-step explanation:
7+2 = 9
9+2 = 11
11+2 = 13
So, it's an Arithmetic sequence with a common difference of 2
Answer:
k=-6
Step-by-step explanation:
-5k-10=14-k
-24=4k
k=-6