What is the surface area of a pyramid that has a base of 27mm and the slanted height is 35mm?

With alll of except for the 2 that i did already

Taylor wants to paint his rectangular deck that is 41 feet long and 24 feet wide. a gallon of paint covers about 350 square feet. how many gallons of paint will taylor need to cover the entire deck? round your answers to two decimal places when necessary.

Aline passes through the point (–7, 5) and has a slope of 1/2 which is another point that the line passes through?