Use the formula for the number of subsets of a set with n elements to solve the problem.A village has 4 fire engines. If a radio dispatcher receives a call, depending on the nature of the situation, no engines, one engine, two engines, three engines, or all four engines can be sent to a fire. How many options does the dispatcher have for sending the fire engines to the scene of the caller?
A. 8
B. 16
C. 15
D. 7
Answer: B
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Provide an appropriate response.Identify the numerical coefficient: -4m
Fill in the blank(s) with the appropriate word(s).
Plot and interpret the appropriate scatter diagram.The table shows the study times and test scores for a number of students. Draw a scatter plot of score versus time treating time as the independent variable. 
What will be an ideal response?
Perform the indicated operation and simplify if possible.
- 
A. 
B. 
C. 
D. 
Solve.The amount of gas that a helicopter uses is directly proportional to the number of hours spent flying. The helicopter flies for 2 hours and uses 18 gallons of fuel. Find the number of gallons of fuel that the helicopter uses to fly for 6 hours.
A. 54 gallons B. 12 gallons C. 63 gallons D. 60 gallons