Find the derivative of the function at the given value of x using a graphing utility. If necessary, round to four decimal places.f(x) = sin(8x); x = 7
A. -521.5343
B. 521.5343
C. -6.8257
D. 6.8257
Answer: D
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Multiply or divide as indicated. Write the answer in lowest terms. 
? 
A. 
B. 
C. 
D. - 
Solve. If necessary, round percents to the nearest tenth, dollar amounts to the nearest cent, and all other numbers to the nearest whole.The mosquito population within a defined area is estimated at 25 million. Due to weather conditions, it is projected that this population will increase by 80%. Find the increase and the projected population.
A. increase: 20 million mosquitos projected population: 5 million mosquitos B. increase: 20 million mosquitos projected population: 45 million mosquitos C. increase: 2000 million mosquitos projected population: 2025 million mosquitos D. increase: 2000 million mosquitos projected population: 1975 million mosquitos
Evaluate the derivative.f'(3) if f'(x) = 
A. - 
B. - 2
C. 
D. - 1
Solve the system.
+ 
= 
- 
= 
A. 
B. 
C. 
D. 