Here is a list of numbers. 12
13 19 16 32
15
13
a) Work out the range of the numbers in the list.
b) Work out the median of the numbers in the list.

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

The roots of the function f(x) = x2 – 2x – 3 are shown. what is the missing number?

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?