What is the relationship between decimals and fractions

Ashopper bought a watermelon a pack of napkins and some paper plates in his state there was no tax on food the tax rate on non-food items is 5% the total for the three items he bought was 825 before tags and he paid $0.19 in taxes how much did the watermelon cost

Find the solutions for a triangle with a =16, c =12, and b = 63º

Find the values of y: 3y^3(y^2+ 2/3y)=0