Which of the tables represents a function?
table a
3 1
3 4
2 3
table b
2 7
5 6
2 9
table c
1 5
7 2
7 3
table d
3 4
1 5
8 5
all other answers of this question that i've seen had been table d, but i'm not entirely sure!

The number of potato chips in a bag is normally distributed with a mean of 71 and a standard deviation of 2. approximately what percent of bags contain between 69 and 73 potato chips? approximately 68% approximately 71% approximately 95% approximately 99.7%

3.4a=57.8 what is the the value of a

If the perimeter of the garden is 37 ft. the width is x and the length is 15 ft. what is the width of the garden in feet?