1. 0.5% of what number is 12

2. You are assigned 24 math problems for homework. You complete 87.5% of these before dinner. How many do you have left to do after dinner?

3.A salesperson receives a 4% commission on sales. The salesperson receives $160 in commission. What is the amount of sales?

4.125 is what percent of 200?

5. 45 is 90% of what number?

6.What number is 120% of 70?

7.You earn a 90% on a science test. You answered 18 questions correctly. How many questions were on the test?

8.A bike cost $180. The sales tax on a bike is $13.50. What is the percent of sales tax?

9.A quarterback completed 72% of his passes in a game. He threw 25 passes. How many passes did the quarterback complete?

Farmers know that driving heavy equipment on wet soil compresses the soil and injures future crops. here are data on the "penetrability" of the same type of soil at two levels of compression. penetrability is a measure of how much resistance plant roots will meet when they try to grow through the soil. compressed soil 2.85 2.66 3 2.82 2.76 2.81 2.78 3.08 2.94 2.86 3.08 2.82 2.78 2.98 3.00 2.78 2.96 2.90 3.18 3.16 intermediate soil 3.17 3.37 3.1 3.40 3.38 3.14 3.18 3.26 2.96 3.02 3.54 3.36 3.18 3.12 3.86 2.92 3.46 3.44 3.62 4.26 use the data, omitting the high outlier, to give a 95% confidence interval for the decrease in penetrability of compressed soil relative to intermediate soil. compute degrees of freedom using the conservative method. interval: to