Subtract and simplify.
- 
A. 
B. 
C. 
D. 
Answer: B
Mathematics
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Solve the problem.The decay of 921 mg of an isotope is given by A(t) = 921e-0.031t, where t is time in years. Find the amount left after 41 years.
A. 893 mg B. 129 mg C. 258 mg D. 251 mg
Mathematics
Write an equivalent expression. Use an associative law.3(np)
A. (3n)p B. 3n + 3p C. 3(n + p) D. 3(pn)
Mathematics
Solve.For a recruitment brochure, a college presented the following graph indicating the continental homes of its student population. 
Write the percent of students from North America as a fraction in simplest form.
A. 
B. 
C. 
D. 
Mathematics
Write as a percent.0.9
A. 900% B. 0.09% C. 90% D. 0.9%
Mathematics