Solve.The number of centimeters, d, that a spring is compressed from its natural, uncompressed position is given by the formula 
where W is the number of joules of work done to move the spring and k is the spring constant. Solve this equation for W. Use the result to determine the work needed to move a spring 8 centimeters if it has a spring constant of 0.6.
A. W = 2d2k
B. W = 
C. W = 
D. W = 
Answer: C
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Plot the two points given by the ordered pairs.A(-5, 0), B(0, 5)
A. 
B. 
C. 
D. 
Use the ZERO or the INTERSECT feature on your calculator to approximate all the zeros of the function to three decimal places.f(x) = 4x4 - 1.3x3+ 0.5x2 - 2x - 1
A. -0.245, 3.266 B. 0.383, -0.981 C. -0.383, 0.981 D. 0.981
The table below shows the national expenditures for health care in a certain country for selected years. Find a power model and a linear model for the data where x is the number of years after 1950. Which of the models seems to be the best to use if you are interested in finding the health care costs near the year 1990? Round numerical values in your answers to three decimal places. ? Year National Expenditures for Health Care (in billions) 1960$20.3 1970$71.0 1980$249.3 1990$693.3 2000$1,423.1
A. 
The power model gives more accurate results near the year 1990.
B.
The linear model gives more accurate results near the year 1990.
C.
The power model gives more accurate results near the year 1990.
D.
The linear model gives more accurate results near the year 1990.
E.
The power model gives more accurate results near the year 1990.
Write the comparison as a ratio in the form of a fraction.$2.30 for each can
A. 
B. 
C. 
D. 