Choose the equation that could be used to find two consecutive integers whose sum is 69. (5 points)

select one:
a. n + (n + 2) = 69
b. n + (n + 1) = 69
c. n −(n + 1) = 69
d. n + 2n = 69

Which compound inequality could be represented by the graph?

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

Precalculus question, image attached.