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AB = 8 cm, AC = 6 cm, AD = 7 cm, CD = 2.82 and CAB=50°. (a) Find the length BC, (BC)^2 = (AB)^2 +(AC)^2 -2(AB)(AC)cosA (BC)^2 = 64 +36 - 96cos(50) BC =sqroot100-96cos(50) BC = 6.188 (b) angle ABC, (c) angle CAD , (d) area of triangle ACD

A rectangular container measures 4m by 3m by 500cm. The container is completely filled with 0. 5 long cubic packets. How many such packets are needed to filled 3/4 of the container? V = lwh = 3(4)(5) = 60