How much of the circle is shaded 1/4+3/7

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

How many liters of peroxide should be added to 12 liters of an 8% peroxide solution so that the resulting solution contains 16% peroxide?   original added new amount of peroxide 0.96 liters x 0.96 + x amount of solution 12 liters x 12 + x 0.18 liter 1.14 liters 1.92 liters 2.10 liters

Biggest exam of the which of the following are polynomial functions?