Use a single digit times a power of 10 to estimate the number 0.00006423.

I’m still confused on how to work the percentages

Which of the following is an example of a rational number? a. π b. √ 9 c. √ 8 d. 3.8362319

Which polynomial equation of least degree has -2, -2, 3, and 3 as four of its roots? (x + 2)(x - 3) = 0 (x - 2)-2(x + 3)3 = 0 (x-2 + 2)(x2- 3) = 0 (x + 2)2(x - 3)2 = 0