Please help! Which inequalities represents the domain & range of this problem

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)

The expression 1.01*1.005(^t) gives the amount of money, in thousands of dollars, in carter's savings account (t) years after he opens it. what does 1.01 represent in this expression?

Jim had 3,067.48 in his checking account he wrote a check to pay for two airplane tickets. his account now has 1,845.24.