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3Pi km

Step-by-step explanation:

C = Pi x D

D = 3km

C = Pi x 3km

C = 3Pi km or 9.424777961

9.424

Step-by-step explanation:

Use the circumference formula which is pi times diameter or two times pi times radius you get the same thing regardless. but its pi times 3 and you get 9.42477796077 ... Also pi is also used as 3.14 as a simpler version sometimes not all the time though.

step-by-step explanation:

y = | -2(-2) |     →     y = | 4 |     →     y = 4       ⇒   (-2, 4)

y = | -2(-1) |     →     y = | 2 |     →       y =   2       ⇒   (-1, 2)    

y = | -2(0) |     →     y = | 0 |     →       y = 0         ⇒   (0, 0)

y = | -2(1) |   c →     y = | -2 |     →     y =   2         ⇒   (1, 2)    

y = | -2(2) |     →     y = | - 4 |     →     y =   4         ⇒   (2, 4)