A ladder that is 15 feet long liens against the side of a house The angle of elevation of the latter is 85° find the height from the top of the ladder to the ground

Atriangle with all sides of equal length is a/an triangle. a. right b. scalene c. equilateral d. isosceles

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?

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