2. (10 points) the population of a city is 9,560. the population is growing at a rate of 2.5% annually.

a) use the exponential growth formula (y = a(1 + r)t) to write an equation that estimates the population in t years.

b) use your equation to estimate the population of the city in 20 years. (round to the nearest whole number. you must show your work to receive credit.

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?