Answer:
5 per hour
Step-by-step explanation:
15 miles the total amount he ran divided by 3 the total amount of time
15/3=5 so John ran 5 mph
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
X = 8.5 because 8.5 x 2 = 17 and 17 + 1 = 18
(B) 16.5π
<u>Explanation:</u>
The shape given is a cylinder
The height, h of the cylinder = 4cm
Diameter of the cylinder = 3cm
Radius, r = 1.5 cm
Surface area of cylinder, A = ?
We know:
Surface area of cylinder = 2πrh + 2πr²

Therefore, the surface area would be 16.5π