Twice a number less than 3 is 17

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

Solve 2x − 1 = 11 for x using the change of base formula log base b of y equals log y over log b.

Find the solution set for this equation: t^2+7t=0 separate the two values with a comma.