Mika’s gym allows her to bring 3 guests for free. after the first three, she must pay $7 per guest. how many guests, g, can she bring to the gym if she pays $42? three of these equations give the correct value of g. which equation does not?

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.

The circumference of a circle is 5 pi cm. what is the area of the circle?

Hi, can anyone show me how to do this problem? 100 points for this. in advance