What is 1+1? I am very confused, is it 1, 0, or 3?

Calculate the effective quarterly compound interest rate equivalent to a 1% of monthly compound interest rate.

What is 0.368,0.380,0.365,and 0.383 in order from least to greatest

The weekly amount spent by a company for travel has an approximately normal distribution with mean = $550 and standard deviation = $40. a) what is the probability that the actual weekly expense will exceed $570 for more than 20 weeks during the next year? (note: one year = 52 weeks) b) what is the probability that actual weekly expenses exceed $580 for 10 or more, but 16 or fewer weeks during the next year?