. Humberto evaluates the expression 4t2 for t = 3. He correctly substitutes 3 for t in the expression, but then says that the value is 144.

Iam trying to solve a linear equation for the shoe size of someone 84" tall taking into consideration example 1 is 69" tall with a shoe size of 9 and example 2 is 72 inches tall with a shoe size of 11. i understand that the equation should be y=mx+b and that on the graph the answer is (3,2) but i just don't understand how to create the equation to solve for 84-inches and 60-inches tall questions. after two days, i need .

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 polynomial is in standard form? 3xy+6x®y2 - 4x4y + 19x? y* 18x5 - 7x{y-2xy2 + 1774 x5y5 - 3xy - 11x? y2 +12 15+ 12xy2 - 11x®ys +5x? y2 ?