Hi, please help me with this question. what is 45+46+47+ ... +53+54?

Please don't just take points (this is a repost since someone did that)

Points d and e are midpoints of the sides of triangle abc. the perimeter of the triangle is 48 units. what is the value of t? ο ο ο ο 7t +

This race was first held in 1953 on august 16th. every decade the race finishes with a festival. how many years is this?

Antonio made a scale model of a building. the model's scale is 1 inch to 235 feet and its height is 3.5 inches. what is the exact height of the actual building? enter your answer in the box.