Please help their rest of the questions: how to multiply the both sides of the lowest common multiple of C, D, and the rest of the questions for question number 3. And question number 4 (Equation with 2 or more unknown numbers: Use the cross multiplication to find a in each equation. 50 points if you guys answer quickly! :)

Aman is 6 feet 3 inches tall. the top of his shadow touches a fire hydrant that is 13 feet 6 inches away. what is the angle of elevation from the base of the fire hydrant to the top of the man's head?

Which situation can be modeled by the inequality 5 + 10w ≥ 45? a. you start with $5 and save $10 a week until you have at least $45. b.you start with 5 baseball cards and purchase 10 cards every week until you have at most 45 cards. c.you start with 5 water bottles and purchases cases of 10 water bottles each until you have a total of 45 water bottles. d.you spend $5 plus $10 per week until you have less than $45.

Linda loans her friend $250 with a 5% monthly intrest rate. how much was the whole loan?