daniel is having an inground pool in his backyard. Pools Plus offers charges $42 per hour to install the pool. Pools4U charges a flat rate of $100 plus $22 per hour to install the pool. Let h represent the number of hours for which Daniel hires a pool company to install the pool. Which of the following statements are true? Select all that apply.

Ineed to know the answer to this algebra question.

Apinhole camera is made out of a light-tight box with a piece of film attached to one side and pinhole on the opposite side. the optimum diameter d(in millimeters) of the pinhole can be modeled by d=1.9[ (5.5 x 10^-4) l) ] ^1/2, where l is the length of the camera box (in millimeters). what is the optimum diameter for a pinhole camera if the camera box has a length of 10 centimeters

Which shows a reasonable estimation for 124% of 42 using the distributive property?