Suzanna wants to measure a board, but she doesn't have a ruler to measure with. however, she does have several copies of a book that she knows is 17 centimeters tall. a. suzanna lays the books end to end and finds that the board is the same length as 21 books. how many cenimeters long is the board?

Simplify -4z+2y-y+-18z a.-22z+y b.-14z+2 c.3y+22z d.y +14z

Drag each equation to the correct location on the table. for each equation, determine the number of solutions and place on the appropriate field in the table.

The biologist has a second culture to examine. she knows that the population of the culture doubles every 15 minutes. after 1 hour and 15 minutes, her assistant found that 80,000 bacteria were present. a) what was the size of the initial population? b) predict the size of the culture at t=3 hours. what was the size of the population at 40 minutes? explain and justify your answers. c) create a graph of the population as a function of time. find an equation that can be used to predict the size of the population at any time t. d) examine the rate at which the bacteria culture is growing. how fast is the culture growing after 1 hour? after 1.5 hours? after 2 hours? use a time interval of h = 0.01 hours to estimate these rates. interpret these rates in terms of the context of the problem situation. how do these three rates compare?