The graph of a piecewise-defined function is given. Write a definition for the function. 
A. 
B. 
C. 
D. 
Answer: A
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Use scientific notation to solve the problem.A light-year is the distance that light travels in one year. Find the number of miles in a light-year if light travels 1.86 × 105 miles per second.
A. 6.0 × 1014 miles B. 6.0 × 105 miles C. 6.0 × 107 miles D. 6.0 × 1012 miles
Use scientific notation to solve the problem.A computer can do one calculation in 1.4 × 10-7seconds. How long would it take the computer to do a trillion (1012) calculations?
A. 1.4 × 10-7 sec B. 1.4 × 106 sec C. 1.4 × 105 sec D. 1.4 × 1012 sec
Find the slope 
and an equation of the tangent line to the graph of the function 
at the point 
data-wiris-created="true" varid="variable_id_field" variablename="impvar_31c6b8d8a5c04ae0965244248" />.
?
?
A. 
; 
B. 
; 
C. 
; 
D. 
; 
Find a formula for the expression. Use sigma notation.
A. xny-1 + 
xn-kyk-1
B. xny-1 + 
xn-kyk-1
C. xny-1 + 
xn-kyk
D. + xny-1 + 
xn-kyk-1