Please help me I don’t understand this at all

"how does lena finally defeat the robots? ” this question will best be used to describe the story’s exposition. rising action. climax. falling action.

In the diagram below, dab and dac are adjacent angles. if mdac = 25°, what is mdab in degrees? what is mbac in degrees?

Apositive number a or the same number a increased by 50% and then decreased by 50% of the result?