Robert bought new carpet for his living room. The store charged a flat rate of $300.00 to remove the old carpet and install the new carpet. Robert paid $2.79 per square foot for carpet. Before taxes, Robert paid a total of $1,262.55 for carpet. How many square feet of carpet did

Robert purchase?

A. 345 square feet

B. 560 square feet

C. 452 square feet

D. 153 square feet

If a || b and b | y, then ? a) x || y. b) x | a. c) a | y. d) a || y.

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

20 ! brainliest ! add and simplify your answer.