California has a population of approximately 4 × 10^7 people and South Dakota has a population of approximately 8 × 10^5 people.

Write each expression in exponential form and find its value. 3 x 3 x 3

Evaluate the expression for the given value of the variable 2×(c2-5) for c=4

The first few steps in solving the quadratic equation 9x2 + 49x = 22 ? 5x by completing the square are shown. 9x2 + 49x = 22 ? 5x 9x2 + 54x = 22 9(x2 + 6x) = 22 which is the best step to do next to solve the equation by completing the square? 9(x2 + 6x + 3) = 25 9(x2 + 6x + 3) = 49 9(x2 + 6x + 9) = 31 9(x2 + 6x + 9) = 103