Solve.
In the figure shown, the height of the triangular portion is 15 ft less than the base. The area of the whole figure is 900 ft2. Find the base.
A. 45 ft
B. 30 ft
C. 50 ft
D. 40 ft
Answer: D
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Find the exact value by using a sum or difference identity.tan 75°
A. - 
+ 2
B. - 
- 2
C. 
- 2
D. 
+ 2
Solve the problem.Approximately 26.9% of all students at a city college commute to school. Write this percent as a fraction or mixed number in simplest form.
A. 
B. 26
C. 
D. 2
Find a formula for the inverse of the function described below.An organization determines that the cost per person of chartering a bus is given by the formula 
where x is the number of people in the group and C(x) is in dollars.
A. C-1(x) = 
B. C-1(x) = 
C. C-1(x) = 
D. C-1(x) = 
Find the expected value.Mr. Cameron is sponsoring an summer concert. He estimates that he will make $300,000 if it does not rain and make $60,000 if it does rain. The weather bureau predicts the chance of rain is 0.34 for the day of the concert. What are Mr. Cameron's expected concert earning?
A. $300,000 B. $360,000 C. $60,000 D. $218,400