According to the Polar Science Center, the arctic sea ice volume fluctuates between April and September every year. Next year the arctic sea volume is expected to be 28,000 cubic km in April and 11,500 cubic km in September. The area the ice covers is typically reduced by 30% between April and September. For example, if the area of the ice extent was 1000 square kilometers in April, then the area of the ice extent would be 700 square kilometers in September.

Your task is to

(1) Determine how much the thickness (height) of the ice will change by next year? (20%, 30%, 40%, 50%?)

(2) If the thickness reduces by more than 40%, more polar bears come into towns. Write a report to the town of Churchill (in Manitoba Canada) on your whether you think polar bears will be visiting their town next year. Include your calculations in this report.