How many four-letter permutations can be formed from the first five letters of the alphabet?

Ab based on the given diagram, if m_1 = 60° then m 2 = 30 60 90 180

Samantha is growing a garden in her back yard. she spend $90 setting up the garden bed and buying the proper garden supplies. in addition, each seed she plants cost $0.25. a. write the function f(x) that represents samantha's total cost on her garden. b. explain what x represents. c. explain what f(x) represents. d. if samantha plants 55 seeds, how much did she spend in total?

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16