Determine whether the relation is or is not a function.DomainRange 
A. Function
B. Not a function
Answer: B
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Graph the quadratic function.f(x) = -x2 + 6x - 8
A. 
B. 
C. 
D. 
Solve the problem by using two equations with two variables.A chemist needs 50 milliliters of a 48% solution but has only 42% and 57% solutions available. Find how many milliliters of each that should be mixed to get the desired solution.
A. 33 ml of 42%; 20 ml of 57% B. 33 ml of 42%; 17 ml of 57% C. 20 ml of 42%; 30 ml of 57% D. 30 ml of 42%; 20 ml of 57%
Translate into an equation, then solve.Bob works as a salesman. He was told that he will get a bonus if he has 
in sales over a four-week period. The first week his sales were 
The second week his sales were $1820. The third week his sales were 
How much must Bob sell during the final week to get the bonus?
A. 2350 + 1820 + 3160x = 12,110; x = 
B. 2350 + 1820 + 3160 - x = - 12,110; x = 
C. 2350 + 1820 + 3160 + x = 12,110; x = 
D. 2350 + 1820 + 3160 = x + 12,110; x = 
Solve the problem.Newton's Law of Cooling states that the rate of change of temperature of an object is proportional to the difference in temperature between the object and the surrounding medium. Thus, if T is the temperature of the object after t hours and T0 is the (constant) temperature of the surrounding medium, then
where k is a constant. A cup of coffee with a temperature of 104°F is placed in a freezer with a temperature of 0°F. After 7 minutes, the temperature of the coffee is 59.4°F. What will its temperature be 20 minutes after it is placed in the freezer? Round your answer to the nearest degree.
A. 18°F B. 19°F C. 21°F D. 16°F