Find the exact value of the expression.csc 90°
A. -2
B. 2
C. -1
D. 1
Answer: D
Mathematics
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Determine if the matrix is in row-echelon form.
A. Yes B. No
Mathematics
Solve the problem.Write 46 out of 50 plant species as a reduced fraction and as a percent.
A. 
, 920%
B. 
, 92%
C. 
, 9.2%
D. 
, 920%
Mathematics
Find the quotient.
A. 
B. 
C. 
D. 
E. 
Mathematics
Add or subtract. Then simplify by collecting like radical terms, if possible. Assume that no radicands were formed by raising negative numbers to even powers.8
+ 7
A. 15
B. 15
C. 8
+ 7
D. 56
Mathematics