The doubling time of a population of flies is 5 hours. by what factor does the population increase in 30 hours? by 1 week?

What number should be added to both sides of the equation to complete this square? x^2-10x=7

240 seventh graders and two-thirds of the students participate in after-school activities how many students participate in after-school activities

Andres wants to share 1/2 of his birthday cake with his friends. if he has 8 friends, how much of the cake will each friend recieve? draw a model to support your work (its ok if you cant)