Which of the following is an equivalent representation of 3which of the following is an equivalent representation of 3^-4 ?

a. 1/9

b. 1/81

c. 1/27

d. 1/256

Is the power produced directly proportional to the wind speed, give reasons for your answer?

Atorch and a battery cost 2.50 altogether.the torch costs 1.50 more than the battery.what fraction of the total price is the torch? give your answer in its simplest form.

Solve the formula ax+ by = c for x.