Determine whether the two pairs of numbers are proportional.0.2, 0.3 and 1.5, 1.8
A. Yes
B. No
Answer: B
Mathematics
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Provide an appropriate response.A certain drug is eliminated from the bloodstream exponentially with a half-life of 12 hours. Suppose that a patient receives an initial dose of 25 milligrams of the drug at midnight. Estimate when the drug concentration will reach 20% of its initial level.
A. 40 hours B. 16 hours C. 58 hours D. 28 hours
Mathematics
Replace the polar equation with an equivalent Cartesian equation.r cos ? = 7
A. 7y = 1 B. y = 7 C. x = 7 D. 7x = 1
Mathematics
Simplify and reduce to lowest terms.
+ 
A. 
B. 
C. 
D. 
Mathematics
Decide if the inequality is true or false.- 
< - 
A. False B. True
Mathematics