Write the inequality using interval notation, and illustrate the inequality using the real number line.-10 ? x ? -6
A. [-10, -6]
B. (-10, -6]
C. [-10, -6]
D. (-10, -6)
Answer: C
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Solve the problem.In the formula A = Iekt, A is the amount of radioactive material remaining from an initial amount I at a given time t and k is a negative constant determined by the nature of the material. A certain radioactive isotope has a half-life of approximately 900 years. How many years would be required for a given amount of this isotope to decay to 75% of that amount?
A. 299 yr B. 225 yr C. 374 yr D. 1800 yr
Solve the problem.The sum of three numbers is -11. The first, minus the second, plus 3 times the third, is -9. The third, plus 5 times the first, plus the second, is -27. What are the numbers?
A. No solution B. 4, 4, 3 C. -4, -4, -3 D. -4, -4, -4
Solve the problem.The perimeter of a rectangle is 44 inches and its area is 105 square inches. What are its dimensions?
A. 6 in. by 14 in. B. 6 in. by 16 in. C. 8 in. by 14 in. D. 7 in. by 15 in.
Tell whether the expression is a polynomial. If it is, give its degree.-9
A. Polynomial, degree 0 B. Polynomial, degree -9 C. Polynomial, degree 1 D. Not a polynomial