A security guard uses 20 minutes of every hour to walk outside the school, leaving the remaining 40 minutes for monitoring inside the school. Write the ratio that represents the time the
security guard spends outside to the time spent inside.

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?