A rectangular beam will be cut from a cylindrical log of radius r=40 inches. Suppose that the strength of a rectangular beam is proportional to the product of its width and the square of its depth. Find the dimensions of the strongest beam that can be cut from the cylindrical log.
Mathematics
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Find all the second order partial derivatives of the given function.f(x, y) = 
A. 
= - 
; 
= 
; 
= 
= 
B. 
= - 
; 
= 
; 
= 
= 
C. 
= - 
; 
= 
; 
= 
= 
D. 
= 
; 
= - 
; 
= 
= 
Mathematics
Use a 4-column table to solve.A woman has $1.70 in dimes and nickels. She has 5 more dimes than nickels. How many nickels does she have?
A. 18 nickels B. 8 nickels C. 3 nickels D. 13 nickels
Mathematics
Draw a line that has the given slope and 
m = - 
, b = 4 
A. 
B. 
C. 
D. 
Mathematics
Find the area of the circle. Use 3.14 or 
for ? as indicated.Use 3.14 for ?.
A. 81.64 cm2 B. 530.66 cm2 C. 132.665 cm2 D. 40.82 cm2
Mathematics