A company is going to make an oil container in the shape of a cylinder. As shown below, the container will have a height of 8m and a radius of 7m. The container will be made from steel (including its top and bottom). Suppose the total cost of the steel will be $21,760.20. How much will the steel cost per square meter? Use 3.14 for π, and do not round your answer.

Which situation can be modeled by the inequality 5 + 10w ≥ 45? a. you start with $5 and save $10 a week until you have at least $45. b.you start with 5 baseball cards and purchase 10 cards every week until you have at most 45 cards. c.you start with 5 water bottles and purchases cases of 10 water bottles each until you have a total of 45 water bottles. d.you spend $5 plus $10 per week until you have less than $45.

The? half-life of a radioactive substance is 20 years. if you start with some amount of this? substance, what fraction will remain in 120 ? years

50 points~ ! i have to turn this in tomarrow