Property tax is based on the assessed value of a property. A house that has an assessed value of $200,000 has a property tax of $4,820. Find a mathematical model that gives the amount of property tax y in terms of the assessed value x of the property. Use the model to find the property tax on a house that has an assessed value of $230,000. (Round your answer to four decimal places.)
?
A. 
B. 
C. 
D. 
E. 
Answer: B
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A graph of a function that is decreasing at a decreasing rate is concave down.
Answer the following statement true (T) or false (F)
Use the LCD to clear fractions and solve the given equation.- 
= y - 
A. 
B. 
C. - 
D. - 
Solve the problem.Suppose an animal feed to be mixed from soybean meal and oats must contain at least 100 lb of protein, 20 lb of fat, and 9 lb of mineral ash. Each 100-lb sack of soybean meal costs $20 and contains 50 lb of protein, 10 lb of fat, and 8 lb of mineral ash. Each 100-lb sack of oats costs $10 and contains 20 lb of protein, 5 lb of fat, and 1 lb of mineral ash. How many sacks of each should be used to satisfy the minimum requirements at minimum cost? Fractional sacks are allowed.
A. 
sacks of soybeans and 
sacks of oats
B. 2 sacks of soybeans and 0 sacks of oats
C. 
sacks of soybeans and 
sacks of oats
D. 0 sacks of soybeans and 4 sacks of oats
Solve the problem.A police helicopter is monitoring the speed of two cars on a straight road. The helicopter is at an altitude of 4200 feet directly above the road. At one instant, the angle of elevation from the first car to the helicopter is 
and the angle of elevation from the second car to the helicopter is 
How far apart are the two cars to the nearest foot?
A. 657 feet B. 5478 feet C. 215 feet D. 5780 feet