4^m x 4^2 = 4^12 whats m?

Using the quadratic formula find the zeros of the given polynomial -5x^2+3x-11

The sales tax rate is 7.25%. how much tax in dollars is added on an item that costs $56.00? a. $4.06 b. $7.25 c. $14.50 d. $60.06

Find the multiplicative inverse of 8-12i