Which is the equation for the nth term of the geometric sequence: -4,8,-16...?

With number 11 ( show how you got the answer)

Write the factored form of this trinomial 9x^2+18x-7

‼️‼️‼️‼️‼️the pressure exerted on the walls of a container by a gas enclosed within it is directly proportional to the temperature of the gas. if the pressure is 6 pounds per square inch when the temperature is 440 f, find the pressure exerted when the temperature of the gas is 380°f. (show work)