Evaluate using the correct order of operation.
× 
A. 
B. 
C. 
D. 
Answer: C
Mathematics
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Convert the units.7 yd = 
in.
A. 21 B. 0.19 C. 84 D. 252
Mathematics
Find the value of the determinant.
A. -127 B. -93 C. 127 D. -55
Mathematics
Find the sum or difference, and write in lowest terms, if necessary.-
+ 
+ 
A. - 
B. - 
C. - 
D. - 
Mathematics
Solve the problem.The half-life of a radioactive element is 130 days, but your sample will not be useful to you after 80% of the radioactive nuclei originally present have disintegrated. About how many days can you use the sample?
A. 312 B. 297 C. 302 D. 287
Mathematics