Chi is building a sandcastle in the shape of a triangular pyramid. the area of the base is 7 square feet. each side of the base has a length of 4 ft and the height of each face is 2 feet. what is the surface area?

Select the correct answer. joshua likes to read. he read 6 books when he was 6 years old. every year he doubled the number of books he read the previous year. how many total books did he read between the ages of 6 and 10? a. 60 b. 90 c.186 d.187

Student price tickets to a movie are $1 and non student tickets are $2. 350 tickets are sold and the total amount made is $450. how many non student tickets were sold ? a) 100 b) 150 c) 200 d)250

Sketch one cycle if the cosine function y=2cos2theta