To find the unit rate of a given amount, you have to divide the price by the fluid oz or amount. In this case it is 1.19 / 12. The quotient is 0.0991666667 or (rounded) $0.10.
Answer:
m+m×0.15
because it increased by 15%
you get m's 15% if you multiply it with 0.15
20^2=10^2+2√39^2
400=100+12.49
400=112.49
means c^2>a^2+b^2
so the answer is an obtuse triangle
