The oil sands reserves of Canada are estimated at 3.5 x 10^11 tons. How long would this supply last at a rate of consumption of 9.1 x 10^8 tons per year? Round your answer to 3 significant digits.
a. 380 yrs
b. 384 yrs
C385 yrs

answer is 144

step-by-step explanation:

you need to give us more information since we can't answer

127

whether it's diameter, or radius, i believe if i remember correctly from school, every amount has to always add up to 180. so if you take 53, and starting adding, long story short, taking 127 and adding it to 53, gives you 180.