Which could be the entire interval over which the function, f(x), is positive?

What is the point of inflection for the function f(x)=2cos4x on the interval (0, pi/2)

Marking brainliest for original answer.. are these two triangles similar? how can you tell?

Agame has a rectangular board with an area of 44 in2. there is a square hole near the top of the game board in which you must not toss in a bean bag. the square has side lengths of 3 in. what is the probability of not tossing the bag through the hole? a)9/44 b)3/9 c)3/44 d)35/44