Joe deposits $30,000 for his retirement in an account with a 6% simple interest rate. how long will it take joe to earn $21,600 in interest?

The mean of a set of data is -3.82 and its standard deviation is 2.31. find the z score for a value of 3.99.

The classrooms are trying to raise $1,200.00 for charity. mrs. leblanc's class has raised 50%. mr. patel's class has raised $235.14 ms. warner's class has raised 1/3 as much as mrs. leblanc's class. how much more money is needed to reach the goal of $1,200.00?

Jackie purchased 3 bottles of water and 2 cups of coffee for the family for $7.35. ryan bought 4 bottles of water and 1 cup of coffee for his family for 7.15. how much does each bottle of water cost? how much does each cup of coffee cost?