calculator permitted. The number of bacteria in the petri dish was 400 at noon, and nine hours later the bacteria count was 800. Assume the exponential growth and find the number of bacteria present 24 hours later.

Mrs. avila is buying a wallpaper border to go on all of her kitchen walls. she wants to buy 5 extra feet of wallpaper border than she needs to be sure she has enough. she buys 55.5 feet of the border. the store owner selling the border uses the width of mrs. avila's kitchen to determine that the length of her kitchen must be 14.5 feet.