Malik considers the enlargement of the trapezoid. Not drawn to scale

What is the correct cross product that he should use to solve for the missing dimension?
(10)(25) = 18x
(10)(18) = 25x
(18)(25) = 10x
(18)(10) = 18x

The correct answer is -4

Period is the time it takes for one “cycle” to complete. in the parent sine function, period is 2*pi since sin(0) = 0, sin(pi/2) = 1, sin(pi) = 0, sin(3pi/2) = -1, and sin(2pi) = 0. at that point, the sequence repeats itself. i’m not sure if your graph is similar to the sine function since you didn’t provide a picture, but you can find the period by looking at a graph.

14 estimated and 13.62 exacti’m pretty sure..