10. simplify the radical expression. (5+ sqrt3) (5- sqrt3)
a) 16
b)22
c)25 +10 sqrt3
d)16+10 sqrt3

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

After two years, how much has been paid into interest?

Parabolas y=−2x^2 and y=2x^2 +k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.