Answer: 14
Step-by-step explanation:
Given
Excavation cone measures
height 
Diameter 
Truck can dump
at a time
The volume of a cone is

Putting values

No of trips(N) required to accumulate this much volume is given by

Therefore, 14 trips are necessary to accumulate a cone of volume 
Answer:
Step-by-step explanation:
width is 9 and the perimiter is 21
Answer:

Step-by-step explanation:
Let
represent the number of hours Gary must work per week.
The contract states that Garry must work more than 20 hours.
This can be represented algebraically by the inequality;

It’s B because the y intercept is +3