Which represents the empirical formula for a3b9?
ab3
ab2
a3b9
a9b27

Aquadratic function f(x) has a turning point at (3,-7). what is the turning point of -f(x)?

The long jump record, in feet, at a particular school can be modeled by f(x) = 19.6 + 2.5ln(x + 1) where x is the number of years since records began to be kept at the school. what is the record for the long jump 11 years after record started being kept? round your answer to the nearest tenth.

Which of the following is a proper fraction? a. 9⁄8 b. 5⁄6 c. 7⁄3 d. 4⁄2