The polynomial is given in one of the three forms: standard, root, or factored. Change it to the specified form. f(x) = -4x2 + 4x + 80; write in root form
A. f(x) = 4(x - 5)(x + 4)
B. f(x) = - 
(x - 5)(x + 4)
C. f(x) = -4(x + 5)(x - 4)
D. f(x) = -4(x - 5)(x + 4)
Answer: D
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Solve the problem.When exposed to ethylene gas, green bananas will ripen at an accelerated rate. The number of days for ripening becomes shorter for longer exposure times. Assume that the table below gives average ripening times of bananas for several different ethylene exposure times:
Plot the data and then find a line approximating the data. With the aid of this line, find the limit of the average ripening time as the exposure time to ethylene approaches 0. Round your answer to the nearest tenth.
A. 
2.6 days
B. 
0.1 day
C. 
37.5 minutes
D. 
5.8 days
Solve the problem.The hypotenuse of a right triangle is 9 feet long. One leg of the triangle is 3 feet longer then the other leg. Find the perimeter of the triangle.
A. 
ft
B. 
ft
C. (3
+ 9) ft
D. (3
- 9) ft
Assuming that the equations define x and y implicitly as differentiable functions 
find the slope of the curve 
at the given value of t.2x + 4x3/2 = t3 + t, y(t + 1) - 4t
= 9, t = 0
A. -6
B. 
C. 6
D. 3
Solve.There are 65 students in Jose's class. 
of the students are science majors. How many students are science majors?
A. 26 B. 24 C. 39 D. 130