Solve the problem.The half-life of plutonium-234 is 9 hours. If 20 milligrams is present now, how much will be present in 2 days? (Round your answer to three decimal places.)
A. 13.819
B. 0.496
C. 17.145
D. 4.286
Answer: B
Mathematics
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Simplify.
A.
B.
C.
D.
Mathematics
Solve the problem.Consider the following 1 × 1, 2 × 2, and 3 × 3 matchstick designs.How many matchsticks are needed for a 12 × 12 design?
A. 288 B. 148 C. 156 D. 312
Mathematics
Solve the problem.Find the value for x in the following special right triangle. Use exact values. 3 m
A. 6 m
B. m
C. 6 m
D. 3 m
Mathematics
Write a variable expression to describe the situation.The ratio of brick houses to wooden houses in a particular city is 5 to 11. Let b = the number of brick houses and w = the number of wooden houses.
A. =
B. =
C. =
D. =
Mathematics