ΔDEF is similar to ΔABC as shown below, and x represents the length of segment EF. Which proportion can be used to find, x, the length of segment EF?
a. 2/5 = 6/x
b. 5/6 = x/2
c. 5/2 = 6/x
d. 6/5 = 2/x

The graph below shows the height of a projectile t seconds after it is launched. if acceleration due to gravity is -16 ft/s2, which equation models the height of the projectile correctly?

Which of the following represents the factorization of the trinomial below? x^2+7x-30

Frank is lending $1,000 to sarah for two years. frank and sarah agree that frank should earn a real return of 4 percent per year. instructions: a. the cpi (times 100) is 100 at the time that frank makes the loan. it is expected to be 113 in one year and 127.7 in two years. what nominal rate of interest should frank charge sarah?