Simplify two b to the power of negative 3?

About 3/4 of the students on the track team are girls. About 3/4 of these girls are in grade 8. What fraction of the students on the track team are grade 8 girls

If Yolanda has a 1/6 cup ladle that she uses to our gravy over potatoes she uses one full ladle for each serving of potatoes what if Yolanda has one cup and two cups and four cups what would be the servings for 1,2,4

What is the solution to the equation x - 0.25 = 1.8? x = ?

If tan 0 = ½ then what is 0?

A young boy dropped his deck of baseball cards. Unwilling to count them again he remembered that when he put them in piles of two, there was one card left over. When he put them in stacks of three, there was one card left over.

Solve using substitution. 2x-3y x+y=9 just so you know, I know the answer its (3,6). I just need the explanation on how to get that answer using substitution.

A speed boat is traveling at 100 km/hr. How many hours will it take for the boat to cover a distance of 115 km?

A die contains the numbers 1 through 6. David rolls the die 2 times. What is the probability of getting a 3 on the first roll and a 5 on the second roll?

The equation y = 55x + 85 describes the amount of money a plumber charges, where y is the total amount he charges and x is the number of hours he works. The table shows the total amount of money an electrician charges.

The formula C = 2πr relates the radius r of a circle to its circumference C. Solve the formula for r.