Determine whether the study is an experiment or an observational study.A poll is conducted in which professional musicians are asked their ages.
A. experiment
B. observational study
Answer: B
Mathematics
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Find the average value of the function f over the given region.f(x, y) = ex2 over the region bounded by 
, 
, 
, and 
.
A. 2e - 1
B. e - 1
C. 
D. 
Mathematics
3T = ? mL
A. 30mL B. 45mL C. 20mL D. 15mL
Mathematics
Solve.Find the discount when the original price is $194.60 at a discount of 20%.
A. $3.89 B. $155.68 C. $38.92 D. $190.71
Mathematics
Provide an appropriate response.The only real number that does not have a reciprocal is .
Fill in the blank(s) with the appropriate word(s).
Mathematics