Solve the problem.Ultraviolet radiation from the sun is thought to be one factor causing skin cancer. The amount of UV radiation a person receives is a function of the thickness of the earth's ozone layer which depends on the latitude of the area where the person lives. The following data represent the latitudes and melanoma rates for nine randomly selected areas in the United States. The melanoma rates refer to a three-year period. 
Graph the data on a scatterplot treating latitude as the independent variable. Find an equation of the line containing the points 
/> and 
Express the relationship using the function name f. Graph the line on the scatterplot. Interpret the slope of the line. Use the line to predict the melanoma rate of an area with a latitude of 39.1 degrees north. 
What will be an ideal response?
y = -0.37x + 40.1
f(x) = -0.37x + 40.1
If latitude is increased by one degree north, then melanoma rate will decrease by 0.37 per 100,000
25.63 per 100,000
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Express the value of the inverse hyperbolic function in terms of natural logarithms.sech-1 
A. ln 
B. ln 
C. Undefined
D. ln 
Simplify by using the order of operations. Round your answer to the nearest hundredth, if necessary.6.42 + 6.6 - 5.8
A. 13.6 B. 51.84 C. 7.2 D. 41.76
Solve the problem.At Allied Electronics, production has begun on the X-15 Computer Chip. The total revenue function is given by 
and the total profit function is given by 
, where x represents the number of boxes of computer chips produced. The total cost function, C(x), is such that 
Find C(x).
A. C(x) = -0.3x2 + 12x + 10 B. C(x) = 8x + 6 C. C(x) = 6x + 10 D. C(x) = 7x + 15
Solve the problem. Round your answer to the nearest tenth, when appropriate.A ball is thrown downward from a window in a tall building. Its position at time t in seconds is given by 
, where s is in feet. How long will it take the ball to fall 
?
A. 2.6 sec B. 1.4 sec C. 1.6 sec D. 2.4 sec