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Answer:
2.00000000e+100
Step-by-step explanation:
2

Answer: The ice sheet's thickness decrease every 6 weeks= 1.5 meters
Step-by-step explanation:
GIven: At the beginning of spring, the ice starts to melt. The variable sss models the ice sheet's thickness (in meters) t weeks after the beginning of spring. 
At t=0, 
So, Thickness of ice sheet at the beginning = 4 meters
Now at t= 6, we get

Thickness of ice sheet after 6 weeks = 2.5 meters
Decrease in thickness = 4 meters - 2.5 meters = 1.5 meters
Hence, the ice sheet's thickness decrease every 6 weeks= 1.5 meters
Answer:
61
Step-by-step explanation:
79 + 40 = 119
180 - 119 = 61
The answer is A. The only multiple of 9 that is between 70 and 80 is 72. 72 divided by 9 equals 8.