The line graph shows the recorded hourly temperatures in degrees Fahrenheit at an airport. 
At what time was the temperature the highest?
A. 1 p.m.
B. 2 p.m.
C. 5 p.m.
D. 11 a.m.
Answer: A
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The amount remaining A, in grams, of a radioactive substance is a function of time t measured in years. The equation of change for A is
?
.
?
A: What can you conclude about the function 
?B: If there are initially 48 grams of the substance present, find a formula that gives A in terms of t. Write your answer using the alternative form for an exponential function.C: How long will it take before only 
of the original amount is left?
What will be an ideal response?
Simplify completely.
A. - 
B. 
C. - 
D. 
Use the substitution formula to evaluate the integral.
A. - 
B. 
C. - 
D. - 
Graph the solution set of the system of inequalities or indicate that the system has no solution.x2 + y2 ? 9x2 + y2 ? 1
A. 
B. no solution
C. 
D. 