1. B. 2.C 3.C. these answers are all correct.
The equation is
so after five days we have
.
We can write the point as
Perpendicular means at 90 degree if the line is on 90 degree to the base then it is perpendicular y-axis and the slope is hypotenuse!
To get circumference you must multiply the diameter by pi(the equivalent to 3.14. If you multiply 4.25 by 3.14 you would get 13.345. If you need to round up it would be 13.3 inches.