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
Step-by-step explanation:


I believe x is equal to 16.5 degrees.
Angle OTA is 33 degrees, and each vector of the angle is tangent to the circle, which makes the arc length of the circle 33 degrees as well.
x is on the opposite side of the circle, and the vectors of its angle contain the same portion of the circle as angle OTA. Since the angle point is on the opposite side of the circle, the arc length is double that of the angle.
Simply divide 33 by 2 and presto: 16.5 degrees.
I hope this helps! :)
Answer:
TR = 23
Step-by-step explanation:
first we have to find TS, so we subtract 16 from 4 to get 12. then we can add 12 and 11 to get TR