Question: Solve the following problems. 1.If C varies jointly as D and E, and given that C= 64 when D=2 and E=8, what is C when

Solve the following problems. 1.If C varies jointly as D and E, and given that C= 64 when D=2 and E=8, what is C when D=3 and E=4? 2. The area A of a triangle varies jointly as its base b and height h. If A= 30 when b=5 and h= 12, find the constant k and the area A when b=10 and h=6. 3.The volume V of a cylinder varies jointly as the square of its radius r and its height h. What is the height of a cylinder with radius 5 cm and volume 785 cm? A cylinder with radius 4 cm and height 10 cm has a volume of 502.4 cm.What is the height of a cylinder with radius 5 cm and volume 785 cm

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