384" x 80"A4.1 Area A | 130" x 80 | A4.2 Area B 196" x 80" A4.2 Area B x 8 A4.3 Area C Suppose p varies directly as n and inversely as the square of d. If p-42 when n = 7 and d-2, find p when 2a 9a 10 104) 105) The surface area of a cube varies directly as the square 110)+ of the length of one of its sides. A cube has a surface area of 54 cm2 when the length of each side is 3 cm. What is the surface area of a cube with a side of length 6 cm? 16 64 106) The frequency of a 112) vibrating piano string varies inversely as its length. If a 4-ft-long string vibrates at 125 cycles/second, what is the frequency of a piano string that is 2 feet long? Solve. 113) 3-4-1. 5 2 Mixed Exercises: Sections 8.2-8.6 5w 2 1 114) Perform the operations, and simplify. 5m 2n + 3 107) 2n-1- n + 115) 4k k +16 k+1 108) apter 8 Test Sh Th 12 9 1) Evaluate, if possible, for k-4 Sk +8 k+ 16 Determine the values of the varlable for which a) the expression is undefined. b) the expression equals zero. k-9k2 2k 18 k 3k 54 13) 4k 24 8d2 +24d 2c -9 e + 10 4) 203 3) 5n 36 4) Determine the domain of g(x) x3 Write each rational expression in lowest terms 16) 3h-25h+ 8
