Which best describes the shape of the distribution?
a) uniform
b) skewed right
c) skewed left
d) roughly symmetrical

Uniform distribution

Step-by-step explanation:

From the image attached to the question given,  it is called a Uniform distribution.

Uniform distribution is referred to as the  probability statistics and theory, the rectangular distribution or a uniform continuous  distribution  is a family of symmetric probability distributions for which  each of the family member, at all intervals of the same length on the distribution's support are equally probable.

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step-by-step explanation:

4 and 5)16.97 or 12√2

6)15.59 or 9√3

7)y = 15.59 or 9√3     x =27

8)17.80