Miranda is adding the numbers below. 2.9 times 10^10 + 5.35 times 10^10 what is the sum written in scientific notation?
a. 8.25 times 10^10

b. 8.25 times 10^20

c. 82.5 times 10^11

d. 82.5 times 10^-11

step-by-step explanation:

what grade level is this? need to know so i can look in my old textbooks!

isaiah walks 3 miles due north, turns and then 5 miles due east. how far is he from his starting point?

a^2 + b^2 = c^2

let c = distance from starting point.

(3)^2 + (5)^2 = c^2

9 + 25 = c^2

34 = c^2

sqrt{34} = sqrt{c^2}

sqrt{34} = c