In 2015, a company made 2.7×10^11 mailboxes. in 2019, the same company made 3.9×10^12 mailboxes. how many more mailboxes did they make in 2019? (write your answer in scientific notation.)

Desmond wants to sell his car that he paid $8,000 for 2 years ago. the car depreciated, or decreased in value, at a constant rate each month over a 2-year period. if x represents the monthly depreciation amount, which expression shows how much desmond can sell his car for today? 8,000 + 24x 8,000 − 24x 8,000 + 2x 8,000 − 2x

Which number is located at point a on the number line? a number line is shown from negative 10 to 10 with each interval mark on the number line representing one unit. point a is labeled one interval mark to the right of negative 5.

Cd is the perpendicular bisector of both xy and st, and cy=20. find xy.