If r is the radius of a sphere, then the ratio of the surface area of the sphere to the volume of the sphere is ________________________.
Fill in the blank(s) with the appropriate word(s).
3:r
Mathematics
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Solve the equation.ln x + ln (x -1) = ln 6
A. x = 3
B. x = -2
C. x = 
D. x = 3, x = -2
Mathematics
Find the value of x.
?
?
?
A. ?
B. 
C. ?
D. ?
E. ?
Mathematics
Use Heron's formula to determine the area of the triangle. If necessary, round the answer to two decimal places. 
A. 107.78 B. 13.23 C. 54.54 D. 628.45
Mathematics
Fill in the blank with one of the words or phrases listed below. 
By the 
property of equality, the same number may be added to or subtracted from both sides of an equation without changing the solution of the equation.
A. distributive B. constant C. multiplication D. addition
Mathematics