For Questions 19 and 20, the leg opposite to acute ∠A in a right triangle measures 12 units, and the hypotenuse measures 19 units.

19. What is sin A?

20. What is m∠A?

What is the solution to the system of equations? (–2, –8) (–1, –5) (0, –2) (2, 4)

Aball is thrown from a height of 139 feet with an initial downward velocity of 15 ft/s. the ball's height h (in feet) after t seconds is given by the following. h=139-15t-16t^2 how long after the ball is thrown does it hit the ground? round your answer(s) to the nearest hundredth. (if there is more than one answer, use the "or" button.) t =

Jack did 3/5 of all problems on his weekend homework before sunday. on sunday he solved 1/3 of what was left and the last 4 problems. how many problems were assigned for the weekend?