we are given
An air-filled rubber ball


we can use formula of the average normal strain in the rubber

now, we can plug values
and we get

...........Answer
Hi there!
4^6 is basically 4 multiplied by itself 6 times.
4 * 4 * 4 * 4 * 4 * 4
So, the correct answer is D.
Hope this helps!
An = 4n + 4
AKA C is the correct answer.
say n is the number of the month after the start of the year
January would be a1 = 4*1 + 4 = 8
February would be a2 = 4*2 + 4 = 12
and so on
(3x12)+(2x19)-3-3-3-3-3 if that's not right super sorry