The correct answer is 42.
5 • 8 = 40
40 + 2 = 42
Acute since right triangles have a 90 degree angle and obtuse triangles have angles in between 90 and 180
There are several ways in solving quick the 20% of any bill. One of those ways is by getting first the 10% of the amount then will later on be multiplied by two. Another one is by simply dividing the total bill amount by 5, which also 20% of the total bill amount. Hope this helps.