Simplify the expression.
A. 3y + 5
B. 3?y? + 5
C. ?3y + 5?
D. -3y - 5
Answer: C
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Provide an appropriate response.A toxic radioactive substance with a density of 2 milligrams per square centimeter is detected in the ventilating ducts of a nuclear processing building that was used 47 years ago. If the half-life of the substance is 20 years, what was the density of the substance when it was deposited 47 years ago?
A. 25.49 mg/cm2 B. 0.39 mg/cm2 C. 2.69 mg/cm2 D. 10.2 mg/cm2
Use the two steps for solving a linear programming problem to solve the problem.Zach is planning to invest up to $45,000 in corporate and municipal bonds. The least he will invest in corporate bonds is $7000 and he does not want to invest more than $25,000 in corporate bonds. He also does not want to invest more than $32,387 in municipal bonds. The interest is 8.2% on corporate bonds and 6.2% on municipal bonds. This is simple interest for one year. What is the maximum income?
A. $23,290 B. $28,290 C. $5810 D. $48,290
Name the conic.
A. hyperbola B. ellipse C. circle D. parabola
Solve the problem.A bacterial culture has an initial population of 10,000. If its population declines to 3000 in 2 hours, what will it be at the end of 4 hours? Assume that the population decreases according to the exponential model.
A. 900 B. 450 C. 4481 D. 3500