Solve the problem.The demand equation for a certain product is P = 25 - 0.001x, where x is the number of units sold per week and P is the price in dollars at which one is sold. The weekly revenue R is given by 
What number of units sold produces a weekly revenue of $80,000?
A. 2870 units
B. 79,975,000 units
C. 3768 units
D. 21,232 units
Answer: C
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Solve the problem.The table shows the number of new cases (in thousands) of a certain disease diagnosed in a country in various years. 
Let f(t) be the number of new cases (in thousands) of the disease diagnosed at t years since 2010. Use a quadratic model to predict when the number of new cases of the disease diagnosed will be 53,700. (First find a quadratic equation for f in vertex form by using the data for the years 2013 and 2017).
A. 2021 B. 2019 C. 2020 D. 2022
Use an Euler diagram to determine whether the argument is valid or invalid.All dogs are animals.
Therefore, some dogs are pets.
A. valid B. invalid
Provide an appropriate response.Liability insurance protects the insured's vehicle against damage caused by fire, theft, vandalism, etc.
A. True B. False
Solve the problem.Henry Smith buys a $60,000 T-bill at a 6.9% discount for 30 weeks. Find the purchase price of the T-bill. (Assume 52 weeks per year.)
A. $57,372.69 B. $55,223.08 C. $57,611.54 D. $58,805.77