Determine whether or not the function is one-to-one.
A. Yes
B. No
Answer: B
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Express the number in scientific notation.In a certain city, the subway system carried a total of 1,740,000,000 passengers.
A. 17.4 × 109 B. 1.74 × 109 C. 1.74 × 108 D. 1.74 × 1010
The figure shows an angle ? in standard position with its terminal side intersecting the unit circle. Evaluate the indicated circular function value of ?.Find tan ?.
A. - 
B. - 
C. 
D. - 
Solve the problem.Find the equation for the tangent plane to the surface 
at the point 
A. x + y + z = 1 B. x + y + z = -9 C. -11x - 11y + 13z = -9 D. -11x - 11y + 13z = 1
Solve the problem using a system of equations.Paul invested three times as much money in an account paying 4% interest than he did in an account paying 2% interest. If the total interest paid was $630, how much did he invest in each?
A. $13,500 at 4%, $5000 at 2% B. $4500 at 4%, $13,500 at 2% C. $13,500 at 4%, $4500 at 2% D. $135 at 4%, $45 at 2%