What is the length of side DE?

Suppose i flip two identical coins. what is the probability that i get one head and one tail?

Given the equation f(x)=a(b)x where the initial value is 40 and the growth rate is 20% what is f(4)

Zoey made 5 1/2 cups of trail mix for a camping trip. she wants to divide the trail mix into 3/4 cup servings. a. ten people are going on the trip. can zoey make enough 3/4 cup servings so that each person gets one serving? b. what size would the servings need to be for everyone to have a serving?