This table shows the minutes students spent studying for their science exam and the scores they received, Study time (min)
19
12
34
10
17
42
60
15
9
21
30
50
Exam score
82
78
90
78
85
97
100
85
73
90
91
98
Use a graphing calculator to model the data using a linear function,
What is the correlation coefficient of the data?
-0.74
-0.48
0.93
0.98

Circle a has a diameter of 7 inches, a circumference of 21.98 inches, and an area of 38.465 square inches. the diameter of circle b is 6 inches, the circumference is 18.84 inches, and the area is 28.26 square inches. part a: using the formula for circumference, solve for the value of pi for each circle. (4 points) part b: use the formula for area and solve for the value of pi for each circle. (4 points)