What is the expected value of x^3 when x is a normal distribution

What number should be added to the expression x^2+3x+ in order to create a perfect square trinomial? 3/2 3 9/4 9

Interest begins accruing the date of the transaction except for auto loans mortgages credit card cash advances credit card purchases

Which of the following multiplication expressions can be modeled by the tiles shown? check all that apply. 8(3) = 24 6(4) = 24 (3)(12) = 36 24(3) = 72 3(8) = 24 2(12) = 24