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17-18 ARMY AIR FORCES (1) Example: Multiply (+3.04) by (17.8). Solution: Since the signs are the same, the product is +54.112 Answer. (2) Example: (+.00395)×(-345.9)=? Solution: Since the signs are unlike, the product is negative, or -1.366305 Answer. b. Exercises.—Find the product in each of the following exercises. (1) (-1.6)(.9) (2) (-14.4)(-12) 172.8 Answer. (3) (12.5)(1.25) (4) (-9)(-8)(-6) -432 Answer. (5) (-.17)(6)(-5) (6) (2)(3.14)(9) 56.52 Answer. (7) (-.4)(-.4)(-.4) (8) (-1/3)(9/20)(5/6) -1/8 Answer. (9) (22/7)(1.4)(1.4) (10) (-1 2/3)(9/10)(-8/15) 4/5 Answer. c. In division the quotient is positive if the divisor and dividend have the same sign; if the divisor and dividend have opposite signs, the quotient is negative. Example: Divide (-15.625) by (12.5) Solution: Since the dividend and divisor have opposite signs, the quotient is negative. -15.625/12.5=-1.25 Answer. d. Exercises.—Find the quotient in each of the following exercises: (1) (-14.4)÷(0.9) (2) (-4.32)÷(-4.8) 0.9 Answer. (3) (39,483.)÷(-12.3) (4) (1,440.)÷(0.32) 4,500 Answer. (5) (1.679)÷(23) (6) (-23.04)÷(4.8) -4.8 Answer. (7) 1,728/-144 (8) 390.59/-28.1 -13.9 Answer. (9) -72.9/-0.81 (10) 0.6118/87.4 0.007 Answer. 18. Square root.—The process of extracting square root finds many uses in solving problems. Following are the rules: 30