The population of bacteria in a petri dish doubles every 40 seconds. The population of the bacteria is initially 400 organisms. What unit is most appropriate for the time at which the number of bacteria is 300?

a. hour

b. bacteria per hour

c. Second

d. bacteria per second

Which represents the solution set of the inequality 5x-9 < 21? a. x < 12/5 b. x > 12/5 c. x > 6 d. x < 6

Solving algebraic equations 2m+3=11

Johnny rode his bike to a friends house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was unable to play. what was his displacement for the total bike ride trip? what could you use as a reference point ? show the steps to solve this problem.