Solve.The surface speed S in fpm (feet per minute) of a rotating cylindrical object is S = 
,where d is the diameter of the object in inches and n is the rotation in rpm (revolutions per minute). If a grinder has a surface speed of 7500 fpm and a rotation speed of 4777 rpm, what is the diameter of the grinder? Use ? = 3.14.
Fill in the blank(s) with the appropriate word(s).
6 inches
Mathematics
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Find the second derivative of the function.s = 
A. 
= 5t4 - 
- 
B. 
= 20t3 + 
+ 
C. 
= 20t5 + 
+ 
D. 
= 5t3 - 
- 
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Write the expression in standard form.8i + (-6 - i)
A. 6 - 9i B. 6 - 7i C. -6 + 7i D. -6 + 9i
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Determine if the ordered pair is a solution to the given system.
; (-6, -3)
A. Yes B. No
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Give all possible rational zeros for the polynomial.f(x) = 3x3 + 33x2 + 33x + 27
A. ±1, ± 
, ± 
, ± 
, ±3
B. ±1, ± 
, ±3, ±9, ±27
C. ±1, ±3, ±9, ±27
D. ±1, ±3, ±6, ±9, ±27
Mathematics