First option because 3 x 10^9 is 3,000,000,000
Answer: 16.1
Step-by-step explanation:
x^2 = 8^2 + (28/2)^2
x^2=64 + 196
x^2= 260
Take the square root of 260 and get 16.1!
I believe you just add all the numbers then divide by how many were there. You would divide by 16.