Calculate the average rate of change in the wind chill temperature in degrees F

Calculate the average rate of change in the wind

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Calculate the average rate of change in the wind chill temperature (in degrees F per mph) when the wind speed changes from 0 to 20 mph. The average rate of change here gives us the change in the windchill temperature for a 1 mph increase in windspeed (on average). wind (mph) 0 5 10 15 20 2 5 30 35 windchill temp (F) 20 13 9 6 4 3 1 0 -2.5 F per mph -0.2 F per mph 4 F per mph -1.4 F per mph Correct!

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-0.8 F per mph The average rate of change (in windchill temp per mph) is the change in windchill divided by the change in windspeed: Question 8 2 / 2 pts The table below shows y as a function of x, so that y=f(x). According to the data in the table, is the function f(x) increasing or decreasing (as x increases)? Does f(x) appear to be concave up, concave down, or linear? x 0 5 10 15 20 25 30 35 y=f(x ) 40 38 32 23 12 -1 - 18 -45 f(x) is decreasing linearly. Correct! f(x) is decreasing and concave down. f(x) is increasing and concave down. f(x) is increasing and concave up. f(x) is decreasing and concave up. is decreasing. Notice that the size of the decrease is getting larger as gets larger. This means that is concave down. This may be more clear by looking at a plot plot of the points in the table
Question 9 2 / 2 pts A graph of a function f(x) is shown above. On the interval [a,b], state whether f(x) is increasing or decreasing. Also whether f(x) is concave up, concave down, or linear on the interval [a,b]. The function is decreasing and linear on the interval [a,b]. Correct! The function f(x) is decreasing and concave up on the interval [a,b].

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The function f(x) is increasing and concave down on the interval [a,b]. The function f(x) is decreasing and concave down on the interval [a,b]. The function f(x) is increasing and concave up on the interval [a,b]. The function is decreasing and concave up on the interval . Question 10 2 / 2 pts Suppose a firm has the monthly revenue function R(x)=20x and the monthly cost function C(x)=12x+8000 where x is the quantity of units produced and sold. Calculate the break-even point, (the quantity the firm must produce and sell per month to make \$0 profit). 800 400 Correct! 1000 1500 300 Set and solve for : Question 11 2 / 2 pts
Simplify the expression: (xy b2 ) b2 (xy−b2)b2 Correct! Question 12 2 / 2 pts The following formula describes the quantity Q of a substance in milligrams (mg) as a function of time t, in hours. Q=45−12t Q=45−12t Choose the correct statement below. When t=0, Q=45mg. Q is decreasing exponentially at 12% per hour. When t=0, Q=0 mg. Q is increasing exponentially at 45% per hour. When t=0, Q=45mg. Q is decreasing exponentially at 12% per hour.

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When t=0, Q=12mg. Q is increasing linearly at 45mg per hour. Correct! When t=0, Q=45mg. Q is decreasing linearly at 12 mg per hour. When , mg. is decreasing linearly, at 12 mg per hour. Question 13 2 / 2 pts A quantity P is a exponential function of time t, that is P=P 0 a t , P=P0at, where a is a positive constant and P 0 P0 is the quantity at t=0.

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