Answer:
Step-by-step explanation:
You finish the leftover.
18.85 inches tall I believe. Tell me if am wrong
The correct answer is Choice A I hope it helps :)
Basically what you do is (the ^ arrow meaning exponent)
You take 3.7 + 4.45 x 10^20
Then 8.15 x 10^20, remove the decimal of 8.15 = 815 x 10^-2 x 10^20
815 x 10^18 = <span>815000000000000000000</span>