HELP PLEASE- 20 POINTS Select all angle measures for which sin∅= -√2/2 A-- 3π/4

B-- 5π/4

C-- 7π/4

D-- 9π/4

E-- 13π/4

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step-by-step explanation:

justin bieber ml.

80π/3 or about 83.775

step-by-step explanation:

since a cone is 1/3 of a cylinder, we need to find the base's area. since area = πr^2, we get 16π. then, multiplying this by 5, we get 80π. dividing by 3, since the cone's volume is 1/3 of that of a cylinder's, we get 80π/3.

hope this !