need help with algebra is someone available asap thanks

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1. Jake and his father are building a rectangular tree house that is 5ft tall, 4 ft wide and 4 ft. long. If the wood costs $2.50 per square foot, what is th least amount Jake and his father can spent on the wood for the tree house?

2. An above-ground circular swiming pool has a radius of 15 feet and a height of 6 feet. What is the surface area of the material that was used to construct the pool?

3. The Lucky Stars Cereal Co. sells a box of cereal that is 8 inches wide, 11 inches high and 3 inches deep. How many square inches of cardboard are needed to make the box of cereal?

4. 

The paper cone used to hold a sample of ice cream at a local ice cream shop is 3 inches in diameter and 2 inches tall with a slant height of 2.5 inches. How much paper is needed to create 100 sample cones?

5. Toblerone chocolate is packaged in a triangular prism as shown below. If there is no overlap, how much stock card is used to make the packaging?

 
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