3 plus 98 what is the answer

Aladder that is 20ft long is leaning against the side of a building. if the angle formed between the ladder and the ground is 75 degrees how far is the bottom of the from the base of the building?

Ron has 8 caps and 4 of his caps are blue. thes rest of his cap are red. how many of ron's caps are red

The base of a solid right pyramid is a square with an edge length of n units. the height of the pyramid is n - 1 units. sia (n-1 n