Find the vertex.f(x) = 7x2 - 28x + 36
A. (2, 8)
B. (8, 0)
C. (2, 0)
D. (8, 2)
Answer: A
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Use the pH scale to answer the question.If the pH of a solution increases by 2, how much does the hydrogen ion concentration change? Does the change make the solution more acidic or more basic?
A. Decreases by a factor of 100; more basic B. Increases by a factor of 20; more acidic C. Increases by a factor of 100; more acidic D. Decreases by a factor of 20; more basic
Estimate the value of the quantity.The velocity of a projectile fired straight into the air is given every half second. Use right endpoints to estimate the distance the projectile travelled in four seconds.
A. 903.6 m B. 942.8 m C. 471.4 m D. 451.8 m
For the smooth curve r(t), find the parametric equations for the line that is tangent to r at the given parameter value 
r(t) = (5 tan t)i - (9 sin t)j + (8 cos2 t)k ; t0 = 
A. x = 10 + 5t, y = -
- 
t, z= -8 + 4t
B. x = 5 + 10t, y = -
- 
t, z = 8 - 8t
C. x = 5 + 10t, y = -
+ 
t, z = 4 + 8t
D. x = 5 + 10t, y = -
- 
t, z = 4 - 8t
Use the vertical line test to determine whether or not the graph is a graph of a function.
A. function B. not a function