Idon't understand these. plus i will mark as brillenit who answers correctly.

1) what are the equivalent fraction and decimal for 33 1/3%?

2) what are the equivalent fraction and decimal for 20%?

3) estimate 78% of 20.

4) you go out to eat with your family, and agree to leave a tip. what is a 15% tip on a $58.00 bill?

5) in a survey of 550 people. 62% like pizza. estimate how many people like pizza.

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?