Answer:
5
Step-by-step explanation:
-12n - 19 = 77
-12n = 96
n = -8
For this case we have that by definition, the surface area of a cone is given by:

Where:
r: It is the cone radius
s: It's the slant height
According to the data we have:
Substituting:

Thus, the surface area of the cone is 
Answer:
Option B
Answer:
1 Hour and 20 minutes
Step-by-step explanation:
Time = Distance ÷ Speed
Answer:
5
Step-by-step explanation:
perpendicular slopes multiply to -1
lets say m is the missing slope
-1/5*m=-1 so m=5