The San Francisco 49ers won 13 out of 16 games last year in the regular season. What is the percentage of the games they won? (round to the nearest percentage)

This week, conrad will work 1 3/4 times longer than last week. giovanni will work 1 1/3 times longer than last week. sally will work 2/3 the number of hours she worked last week. match each employee's name to the number of hours he or she will work this week

Solve -.016x= -16. need solving this

How many quarts of a 50% solution of acid must be added to 20 quarts of a 20% solution of acid in order to get a 40% solution of acid?