Provide an appropriate response.Explain how a quadratic inequality can be solved by examining a parabola that opens upward.
What will be an ideal response?
Consider ax2 + bx + c. If a > 0, then the graph of y = ax2 + bx + c is a parabola that opens up. We can examine the parabola to determine the intervals on which the polynomial has positive values and the interval on which it has negative values. If a < 0, we can multiply both sides of the inequality by -1, reversing the inequality symbol. Then the graph of 
is a parabola that opens up and we can proceed as above.
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Divide and simplify.
÷ 
A. 
B. 
C. 
D. 
Solve the problem.The population growth of an animal species is described by 
where t is measured in months. Find the population of this species in an area 6 months after the species is introduced.
A. 470 B. 240 C. 74 D. 704
Solve the problem.If the radius of a sphere is r feet, then the volume of the sphere is 
?r3 cubic feet. Find the volume of a sphere with radius of 9 feet. Round your answer to two decimal places.
A. 9160.91 cubic feet B. 3053.64 cubic feet C. 1526.82 cubic feet D. 309.39 cubic feet
Find the derivative of the function.y = cos (8x2 + 5)
A. 
= -16 sin 8x2
B. 
= sin (8x2 + 5)
C. 
= -16x sin (8x2 + 5)
D. 
= 16x sin (8x2 + 5)