3. Given rectangles and , and given that rectangle is fully rotated about line BC, answer the following questions. (a) Describe
the figure generated by the rectangle rotating about line BC. (b) About which line could you rotate rectangle to generate a figure that is similar to the first solid? (c) What are the ratios of the surface areas and volumes of the solids generated from and ? (d) Are and golden rectangles? Why or why not?
A circular pool with a diameter of 18 ft will have a uniform
4 ft concrete walkway poured around it. If the concrete cost $4.25 a square
foot, how much will it cost for the concrete?
This can be solve be solving the area of walkway
Area of walkway is equal to = (pi)( 9 ft +4) ^2– (pi)(9ft)^2
= 276.46 sq ft
Cost = 276.46 sq ft * ($4.25 a square foot) = $1174.70
Step-by-step explanation: If the ice caps melts, that means that there is more water in the ocean, the more water in the ocean, the less land there is to live on.