What is the y-intercept of f(x) = 3^x+2?
a. (9,0)
b. (0,9)
c. (0,-9)
d. (9,-9)

Find the interior angle of a regular polygon which has 6 sides

The sales tax for an item was $8.40 and it cost $420 before tax. find the sales tax rate. write your answer as a percentage.

About 29% of the earth’s surface is covered by land. the total surface area of the earth is about 510 million square kilometers. what is the area of the earth’s surface covered by land?