Armando kicks a football into the air. The function ​f(x)=-7x^2+37x+0.23 models the height of the football from the​ ground, in​ feet, with respect to the time x in seconds. Use a graph or table to estimate the time for the ball to return to the ground after being kicked.

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?