A cylindrical tank has a diameter of 12 in. with 20 in. of water. A piece of iron is submerged in the water and the water level is raised 6 in. What is the volume of the piece of iron?​

Which expression can be used to determine the slope of the line that passes through the points -6, three and one, -9

The holiday party will cost $160 if 8 people attend.if there are 40 people who attend the party, how much will the holiday party cost

I'm at a bookstore with $\$35$ in my pocket and a $20\%$-off coupon. what is the cost of the most expensive book i can buy with my money and the coupon? (assume that there are books of every possible price in the bookstore. it's a large bookstore! )