Percentage problems with mixed number 1. What is 15 12 % of 600?

2. Find 33 1/3 % of $1200

3. Calculate 12 1/2% of 160

4. Tim paid 5 14 % interest on $1600 he
borrowed. How much did he pay in
total?

Use the elimination method to solve the system of equations -x+5y=-4 and 4x+3y=16

Acompany that manufactures and sells guitars made changes in their product range. from the start they had 20 models. then they reduced the number of models to 15. as a result, the company enjoyed a 10% increase in turnover. - how much did the stock level change? in (%)

An automobile assembly line operation has a scheduled mean completion time, μ, of 12 minutes. the standard deviation of completion times is 1.6 minutes. it is claimed that, under new management, the mean completion time has decreased. to test this claim, a random sample of 33 completion times under new management was taken. the sample had a mean of 11.2 minutes. assume that the population is normally distributed. can we support, at the 0.05 level of significance, the claim that the mean completion time has decreased under new management? assume that the standard deviation of completion times has not changed.