How can the statement be written as a conditional statement in if-then form? lines on a coordinate plane are perpendicular if they have opposite reciprocal slopes.
a) if lines on a coordinate plane have opposite reciprocal slopes, then they are perpendicular.
b) if lines are on a coordinate plane, then they are perpendicular.
c) if lines are on a coordinate plane, then they have opposite reciprocal slopes.
d) if lines have opposite reciprocal slopes and are perpendicular, then they are on a coordinate plane.

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

An automobile assembly line operation has a scheduled mean completion time, μ, of 12 minutes. the standard deviation of completion times is 1.6 minutes. it is claimed that, under new management, the mean completion time has decreased. to test this claim, a random sample of 33 completion times under new management was taken. the sample had a mean of 11.2 minutes. assume that the population is normally distributed. can we support, at the 0.05 level of significance, the claim that the mean completion time has decreased under new management? assume that the standard deviation of completion times has not changed.

The difference of two numbers is 40. find the numbers if 0.3 parts of one number is equal to 37.5% of the other one.