Solve the problem.The formula D = 7e-0.04h can be used to find the number of milligrams D of a certain drug in a patient's bloodstream h hours after the drug has been given. When the number of milligrams reaches 2, the drug is to be given again. What is the time between injections?
A. 17.33 hr
B. 31.32 hr
C. 48.65 hr
D. 34.43 hr
Answer: B
Mathematics
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Solve using the elimination method. If the system has an infinite number of solutions, use set-builder notation to write the solution set. If the system has no solution, state this.9x - 4y = -54-3x - 2y = 18
A. (-7, 1) B. (-6, 0) C. (-6, 1) D. No solution
Mathematics
Use a percent equation to solve the percent problem.A farm grew 2800 tons of crops last year, of which 47.5% was grown organically. How much grain did the farm grow organically?
A. 1490 tons B. 1330 tons C. 1400 tons D. 1470 tons
Mathematics
Find an irrational number between 1 and 2.
What will be an ideal response?
Mathematics
Clear fractions then solve by substitution.
x + 
y = -5 x - y = 2
A. {(-5, -5)} B. {(4, -5)} C. ? D. {(-4, -6)}
Mathematics