Find the weighted mean of the numbers in the table. Round to the nearest tenth.Five rats were inoculated against a disease. After an incubation period, the number of rats contracting the disease was noted. The experiment was repeated 20 times, with the results shown in the table. 
A. 2.7 rats
B. 3.1 rats
C. 2.4 rats
D. 2.3 rats
Answer: D
Mathematics
You might also like to view...
Perform the indicated operation.
+ 7
+ 5
A. 12
B. 37
C. 37
D. 12
Mathematics
Sketch the graph of the function. Give the coordinates of the vertex.f(x) = (x - 6)2
A. vertex (0, -6)
B. vertex (6, 0)
C. vertex (0, 6)
D. vertex (-6, 0)
Mathematics
Graph the circle.(x - 4)2 + y2 = 1
A. 
B. 
C. 
D. 
Mathematics
Rewrite the original fraction as an equivalent fraction with the given denominator.
= 
A. 
B. 
C. 
D. 
Mathematics