Answer:

Step-by-step explanation:
The relationship between A, the area of the glacier in square kilometers, and t, the number of years the glacier has been melting, is modeled by the equation.:

We want to determine the value of t for which the area, A(t)=15 square kilometers.

Therefore, the time for which the area will be 15 sqyare kilometers is:
-20 ln(1/3) years.
Two complementary angles make a total of 90, so 3x+6x=90, x=10
We can use the points (1, 10) and (-8, 3) to solve.
Slope formula: y2-y1/x2-x1
= 3-10/-8-1
= -7/-9
= 7/9
Best of Luck!
The answer to this question is 7