Sophia babysat for 3 5/12 hours on Friday. She babysat for 3 1/6 hours on Saturday. For the following statements, estimate how long Sophia babysat on Friday and Saturday combined.

Valentino starts with a population of 1,500 amoebas that increases 35% in size every hour for a number of hours, h. the expression 1,500(1+0.35)h finds the number of amoebas after h hours. which statement about this expression is true? a. it is the initial population raised to the growth factor after h hours. b. it is the sum of the initial population and the percent increase. c. it is the sum of the initial population and the growth factor after h hours. d. it is the product of the initial population and the growth factor after h hours.

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15

True or false: the graph of y=f(bx) is a horizontal compression of the graph y=f(x) if b< 1