353. You are constructing a box for your cat to sleep in. The plush material for the square bottom of the box costs $5/ft and the material for the sides costs $2/ft². You need a box with volume 4 ft. Find the dimensions of the box that minimize cost. Use x to represent the length of the side of the box.

Your recipe requires 10 soft-shell crabs. Soft-shell crabs are sold for $3.00 per crab and have a yield percent of 100%. What is the total cost of the crabs?

How should be the process to follow on this question, please? You buy 2,300 pens at the beginning of the school year. You estimate that 20% of them will have to be put on your "discount plate" at the end of the term on which everything is priced at $1. Generally, about 32% of the "discount plate" items will be damaged or broken and will have to be thrown away. The pens cost you $1.27 per pen and you want an average markup of 37% based on selling price. At what price must they start selling the pens?

please very soon urgent sir