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F(n + 1) = f(n) – 8. if f(1) = 100, what is f(6)?

Find the length of the normal and the angle it makes with the positive x-axis. (see pictured below)

Acentral angle measuring 160 degrees intercepts an arc in a circle whose radius is 4. what is the length of the arc the circle formed by this central angle? round the length of the arc to the nearest hundredth of a unit. a) 4.19 units b) 6.28 units c) 12.57 units d) 12.57 square units