Solve the problem.A biologist collected 213 fern and moss samples. There were 157 more moss than fern samples. How many fern samples did the biologist collect?
A. 56 fern samples
B. 185 fern samples
C. 28 fern samples
D. 171 fern samples
Answer: C
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Use the problem-solving strategy for applications of linear equations to solve the application problem.A rectangle's length is twice its width and its perimeter is 132 m. Find its dimensions.
A. 132 m by 66 m B. 44 m by 22 m C. 22 m by 11 m D. 66 m by 22 m
Solve the problem.Set up the triple integral for the volume of the sphere 
in spherical coordinates.
A. 
B. 
C. 
D. 
Find the mean. Round to the nearest tenth unless otherwise stated.Average number of defects: 8.0, 8.2, 8.8, 7.5, 8.3, 8.0, 8.7, 8.8, 7.1, 8.0, 7.5, 7.7, 7.5, 8.2, 8.2, 6.9, 8.3, 8.7
A. 8.3 B. 7.6 C. 8.0 D. 8.5
Tell whether or not the rational expressions are equivalent.
, 
A. Yes B. No