Let the function whose graph is shown be a probability density function. Calculate the mean. 
What will be an ideal response?
Mathematics
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Simplify the expression. Use positive exponents. Assume variables represent nonnegative numbers.(5x5)(4x2)
A. 20x7 B. 20x10 C. 9x10 D. 9x7
Mathematics
Perform the indicated operation. Write the answer in simplest form.
? 
A. 
B. 
C. 
D. 
Mathematics
Rationalize the denominator.
A. 
B. 
C. 
D. 
Mathematics
Tests of an artifact discovered at the Debert site in Nova Scotia show that 25% of the original 14 C is still present. What is the probable age of the artifact? (Use r = -1.20968 ´ 10-4 ) ?
A. 4,977 yr old B. 11,460 yr old C. 10,487 yr old D. 11,082 yr old E. 10,931 yr old
Mathematics