120 bacteria in a petri dish double every 30 minutes. Write an equation for the amount of bacteria after x hours.

Is 40/1000 equivalent to 40%

Last week any ran 31 miles more than Ryan. Amy ran 40 miles. How many miles did Ryan run?

What is the answer to 500 : 60

Brad wants to open a new savings account. He finds one that returns 3% on his investment each year. Use the variable to write a formula for the final balance after one year. Also b = final balance, x = initial investment, and r = return rate.

One of the requirements of becoming a court reporter is the ability to type 225 words per minute. Donald can currently type 180 words per minute, and believes that with practice he can increase his typing speed by 5 words per minute each month.

Which transformations of the graph of f (x) = - 4x result in the graph of f (x) = 4x + 3? 1. reflection over the x-axis and shifted 3 units to the left 2. reflection over the y-axis and shifted 3 units to the right 3.

Jenny is kn her way home in her car. Her drive is 20 miles long. She has finished one-fourth of tje drive so far. How far has she driven?

Simplify 1) 3b + b + 6 = 2) n + 5n - 3c = 3) 12d - 2d + e =

If h = 21 units and r = 7 units, what is the volume of the cone shown above? Use 3.14 for.

Convert the fraction 2/5 to a decimal and a percent. Show all of your work and explain your answer.