URGENT!! Given a4= -4 and a9= 36 of an arithmetic sequence, find the recursive equation and S45. Show all work and verify using your graphing calculator.

[15 points]find the quotient with the restrictions. (x^2 - 2x - 3) (x^2 + 4x + 3) ÷ (x^2 + 2x - 8) (x^2 + 6x + 8)

Awater holding tank measures 105 m long, 50 m wide, and 8 m deep. traces of mercury have been found in the tank, with a concen- tration of 60 mg/l. what is the total mass of mercury in the tank? answer in units of kg.

1: 4 if the wew 35 surfboards at the beach how many were short boards?