384" x 80" A4.1 Area A 130" x 80"A4.2Area B 1196" x80 A4.2 Area B 2 306" x 80" A4.3 Area C 534" x 80" A4.3 Area C Suppose p varies directly as n and inversely as the square of d. If p = 42 when Ï-7 and d-2, find p when n 12 and d 3, The surface area of a cube varies directly as the square 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? 104) 2a2 +9a +10 ÷(2a + 5 0)9 111)64 112) 105) 106) The frequency ofa vibrating piano string varies inversely as its length. Ifa 4-ft-long string vibrates at 125 cycles/second, what is the frequency of a piano string that is 2 feet long? Solve. h h- 3 12 Mixed Exercises: Sections 8.2-8.6 Perform the operations, and simplify 114) 5n 2n-1 2n + 3 Ï+2 108) k + 16 k+1 Chapter 8: Test 1) Evaluate, if possible, for k-4. 5h 7h 5k + 8 + 16 _ c+2 3c + 5 Determine the values of the varlable for which a) the expression is undefined. b) the expression equals zero 4k- 24 81 -k 2c -9 c + 10 2) 3) -5n 36 4) Determine the domain of gtx)- 9 2x + 3 Write each rational expression In lowest terms 32 25h +8 5) Simplify completely