Acircle has a radius of 12.6 cm.
what is the exact length of an arc formed by a central angle measuring 120°?
enter your answer in the box. express your answer using π .

Find the sum to the equation 3+6+9+

What is the value of x in the following equation. -x ^3/2 = -27

Data from 2005 for various age groups show that for each $100 increase in the median weekly income for whites, the median weekly income of blacks increases by $105. also, for workers of ages 25 to 54 the median weekly income for whites was $676 and for blacks was $527. (a) let w represent the median weekly income for whites and b the median weekly income for blacks, and write the equation of the line that gives b as a linear function of w. b = (b) when the median weekly income for whites is $760, what does the equation in (a) predict for the median weekly income for blacks?