Express the number in scientific notation.430,000
A. 4.3 × 105
B. 4.3 × 10-6
C. 4.3 × 106
D. 4.3 × 10-5
Answer: A
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Use even and odd properties of the trigonometric functions to find the exact value of the expression.csc 
A. - 
B. -2
C. 
D. 2
Perform the indicated operations.4.8 + 1.23
A. 6.03 B. 1.71 C. 5.823 D. 5.31
Solve the equation.e3x = 5
A. 
B. 
C. {3 ln 5}
D. 
Solve the problem.The concentration of a drug in the bloodstream, measured in milligrams per liter, can be modeled by the function, 
where t is the number of minutes after injection of the drug. When will the drug be at its highest concentration? Approximate your answer rounded to two decimal places.
A. t = 0.55 minutes after the injection is given B. t = 4 minutes after the injection is given C. at the time of injection D. t = 3.65 minutes after the injection is given