If every dimension of a two-dimensional figure is multiplied by k, by what quantity is the area multiplied?

Find dy/dx using implicit differentiation ln(20+e^xy)=y

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?

Ron has 8 caps and 4 of his caps are blue. thes rest of his cap are red. how many of ron's caps are red