Which expression is equivalent to (82)−4?

What is 140% of 25? because i need

Find an bif a = {3, 6, 9, 12) and b = {2, 4, 6, 8, 10).

In a certain city, the hourly wage of workers on temporary employment contracts is normally distributed. the mean is $15 and the standard deviation is $3. what percentage of temporary workers earn less than $12 per hour? a. 6% b. 16% c. 26% d. 36%