Answer:
5 hours
Step-by-step explanation:
:::::::::::::::
259.99.................................................................
The growth factor is 10.5
second-period class average:
55+70+450+480+170+270+95 = 1590
1590/20 = 79.5
sixth-period class average:
65+225+480+595+270+190 = 1825
1825/20 = 91.25
on average, students in the sixth period class scored higher
the circumference of a circle with the radius being 12.5 is C=78.54
