Provide an appropriate response.A plane averaged 300 mph on a 600 mile trip and then returned over the same 600 miles at the rate of 400 mph. What was the plane's average speed for the entire trip? Give reasons for your answer.
What will be an ideal response?
Since the plane averaged 300 mph on the first 600 miles, the first part of the trip took 
The return trip took 
The entire trip of 1200 miles took 3.5 hours. So the average speed was 
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Sketch the surface z = f(x,y).f(x, y) = 4x2 + 4y2 + 2
A. 
B. 
C. 
D. 
Indicate the metric unit that would be best used to express the mass of the object.A flower petal
A. metric tonnes B. kilograms C. grams D. milligrams
Determine all possible digits to place in the square that make the statement true. If none exist, state this.4,?21 is divisible by 4.
Fill in the blank(s) with the appropriate word(s).
Solve the problem.The force needed to keep a car from skidding on a curve varies jointly as the weight of the car and the square of the car's speed, and inversely as the radius of the curve. If a force of 
is needed to keep an 
car traveling at 20 mph from skidding on a curve of radius 
what force would be required to keep the same car from skidding on a curve of radius 
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Round your answer to the nearest pound of force?
A. 20,769 lb
B. 20,637 lb
C. 20,801 lb
D. 21,339 lb