Identify the interval where f is increasing or decreasing, as indicated. Express your answer in interval notation.f(x) = -5x2 + 10x - 7; decreasing
A. [1, ?)
B. (-?, -1]
C. (-?,1]
D. [-1, ?)
Answer: A
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Provide an appropriate response.Find the equation of the line perpendicular to y - 2x + 3 = 0 and passing through the point 
Solve the equation for y.
Fill in the blank(s) with the appropriate word(s).
Solve.While traveling in a car at a constant speed, the centrifugal acceleration passengers feel while the car is turning is inversely proportional to the radius of the turn. If the passengers feel an acceleration of 12 feet per second per second when the radius of the turn is 80 feet, find the acceleration the passengers feel when the radius of the turn is 240 feet.
A. 5 feet per second per second B. 7 feet per second per second C. 4 feet per second per second D. 6 feet per second per second
Is ?D a vertex angle?
Find the exact value of the expression.cot 
A. 
B. 
- 1
C. 2 + 
D. 2 - 