Find the value of the combination.

how many straight lines can be drawn through 20 points, of which no three lie on any one straight line?

a. 190
b. 380
c. 1,140

Answers; a) 135 degree’s b) 30 degree’s c) 180 or 0 degree’s d) 90 degree’s

Find cot x if sin x cot x csc x = √2

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?