B. A lifeguard wants to use a rope to build a rectangular 8. holding pen for the public to play in. The pen is to have an area of 150 m2. Determine the dimensions of the pen that will require the least amount of rope. a) short sides: 7.5 m. long side: 15 m l b) short sides: 8.7 m, long side 17.3m 0) short sides: 6.06 m, long side: 12.13 m d) short sides: 10 m, long side: 15 m 9. Calculate the volume of this rectangular prism. 9. a) 131'? b) 43113 c) 44113 d) 66fl3