Calculate 
and 
when defined.
?
?
?
A. 
, 
B. 
,
C. 
, 
D. 
,
E. 
,
Answer: C
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Solve the problem.The graph of a trigonometric function f represented by f(t) = a sin (b(x - c)) is shown, where a, b, and c are nonnegative. State the phase shift.
A. 8? B. 3? C. 5? D. 5
Find the value of the expression. 
- 
A. 30 B. -30 C. -10 D. 10
Mark as true any statement that is always true. Mark as false any statement that is never true or that is not necessarily true. Be able to justify your answers.
1. If a right triangle has one leg that is 2 cm long and another leg that is 3 cm long, the area of the triangle is 3 cm2 2. All rectangles with the same perimeter have the same area. 3. All parallelograms with the same area have the same perimeter. 4. The perimeter of a 3" by 1" rectangle is 8 sq.in. 5. The area of a right triangle with legs a and b is one-half the area of a rectangle with dimensions a and b.
Solve the problem.The population, in millions, of a city t years after 1990 is given by 
Find the slope and y-intercept of the equation and explain what each signifies.
A. 2.5 million is the population of the city in 1990 and 0.07 million is the increase per year in the population . B. 2.5 million is the population of the city in 1990 and 0.07 million is the decrease per year in the population . C. 2.5 million is the population of the city in 1991 and 2.57 million is the population in 1992. D. 0.07 million is the population of the city in 1990 and 2.5 million is the increase per year in the population .