PLEASE HELP.
find the angle between u=(-2 8) and v=(6 -2)
a)33.6°
b)53.6°
c)82.4°
d)122.4°

Afamily went out to dinner and their bill was $113.if they want to leave a 19% tip, how much should they leave.

What is the volume of a cardboard box that measures 1 inch by 5 inches by 7 inches? the volume of the cardboard is cubic inches. enter your answer as the number that correctly fills in the blank in the previous sentence. if necessary, round your answer to the nearest tenth, like this: 42.5

At the county fair, animals are judged for the quality of their breeding and health. the animal pens are arranged in an array, with one animal in each pen. a barn can hold at most 10 rows of pens and at most 6 pens in each row, with room for people to walk around them. what different ways can the planners of the county fair arrange the pens for the horses and cows in the same barn?