Use the given functions to find the requested function.f(x) = 3x - 7, g(x) = 8x - 4Find f - g.
A. 5x + 3
B. -5x - 3
C. 11x - 11
D. -5x - 11
Answer: B
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The half-life of a certain radioactive substance is 5 years. What is the yearly percentage decay rate for this substance? Round your answer to two decimal places if necessary. ?
A. 10.65% B. 12.94% C. 13.87% D. 10%
Find the indicated probability or percentage for the normally distributed variable.The mean weekly income of teachers in one state is $390 with a standard deviation of 
The incomes are approximately normally distributed. What is the probability that a randomly selected teacher earns more than $425 a week?
A. 0.099 B. 0.215 C. 0.218 D. 0.782
Solve the problem.The gravitational attraction A between two masses varies inversely with the square of the distance between them. If the force of attraction is 9 lb when the masses are 2 ft apart, what is the attraction when the masses are 6 ft apart?
A. 1 lb B. 3 lb C. 4 lb D. 2 lb
Simplify.Find the difference of 5x + 1 and 7x + 4.
A. -2x + 5 B. 2x - 5 C. -2x - 3 D. -2x + 3