how much of a radioactive kind of yttrium will be left after 20 hours if you start with 720 grams and half-life is 10 hours

Mixed ReviewJorge bought a crate of floor ties
for $95.94. The crate had 6 boxes of floor tiles. Each box
1. contained 20 floor tiles. Write and solve an
equation to determine the cost per box, b. Then
write and solve a second equation to determine the cost per tile, t, to the nearest cent.
2. A convenience store sells two brands of orange juice. Brand A contains 8 fluid ounces and
costs $1.28. Brand B contains 12 fluid ounces and costs $1.68. What is the difference in cost, in
dollars, per fluid ounce between the two brands of juice?

A triangle with 118° and 42 in. is what type of triangle?

I WILL AWARD BRAINLIEST!The Patronete Winery's tastiest wine must have a 12% alcohol content. How many gallons of wine with a 9% alcohol content must be mixed with 3,000 gallons of wine with a 15% alcohol content in order to achieve the desired 12% alcohol content?

A rental car company charges a fixed fee of $30 plus $0.05 per mile. Let C represent the total cost of renting a car and driving it M miles

3. jamal found the mean hourly wage of employees at his company using the data in the table. In a report he stated, “The typical salary at the company is about $23.00 per hour”. How is this graph misleading? 6.50 6.50 6.50 6.50 6.50
6.50 6.50 7.50 7.50 7.50
7.50 7.50 7.50 7.50 7.50
60.00 65.00 75.00 75.00 75.00
A. The mean is not a good measure of the salaries because five employees have salaries far above fifteen employees’ salaries.
B. The mean of the data is not about $23.00.
C. Jamal should always use the highest wage
D. His statement is not misleading

4. which display is best to determine the relationship between the number of hours worked and the amount of money paid.
A. histogram with intervals of 5
B. histogram with intervals of 3
C. line plot
D. line graph

Chet's father is five times as old as Chet. In six years, his father only be three times as old. How old is Chet now?