Your on-line bookstore is in direct competition with Amazon.com, BN.com, and Borders.com. Your company's daily revenue in dollars is given by $R ( x , y , z ) = 25,000 - 0.02 x - 0.02 y - 0.01 z + 0.00005 y z$
Where x, y, and z are the online daily revenues of Amazon.com, BN.com, and Borders.com, respectively. If Amazon.com and BN.com each show a daily revenue of $1,000, give an equation showing how your daily revenue depends on that of Borders.com.

A)R (z) = 24,960 + 0.04z
B) R (z) = 25,000 - 20x - 20y - 0.01z + 0.00005yz
C) R (z) = 25,000 - 0.01z
D) R (z) = 24,960
E) R (z) = 25,000 - 0.01z + 0.00005z

Question

Your on-line bookstore is in direct competition with Amazon.com, BN.com, and Borders.com. Your company's daily revenue in dollars is given by   $R ( x , y , z ) = 25,000 - 0.02 x - 0.02 y - 0.01 z + 0.00005 y z$  
Where x, y, and z are the online daily revenues of Amazon.com, BN.com, and Borders.com, respectively. If Amazon.com and BN.com each show a daily revenue of $1,000, give an equation showing how your daily revenue depends on that of Borders.com.
 
A)R (z) = 24,960 + 0.04z
B) R (z) = 25,000 - 20x - 20y - 0.01z + 0.00005yz
C) R (z) = 25,000 - 0.01z
D) R (z) = 24,960
E) R (z) = 25,000 - 0.01z + 0.00005z

Quizplus · Accepted Answer

When x and y are both 1000, the revenue function becomes:R(z) = 25,000 - 0.02(1000) - 0.02(1000) - 0.01z + 0.00005(1000)(z)= 25,000 - 20 - 20 - 0.01z + 0.5z= 24,960 + 0.04z

Your On-Line Bookstore Is in Direct Competition with Amazon R(x,y,z)=25,000−0.02x−0.02y−0.01z+0.00005yzR ( x , y , z ) = 25,000 - 0.02 x - 0.02 y - 0.01 z + 0.00005 y zR(x,y,z)=25,000−0.02x−0.02y−0.01z+0.00005yz

Your On-Line Bookstore Is in Direct Competition with Amazon $R ( x , y , z ) = 25,000 - 0.02 x - 0.02 y - 0.01 z + 0.00005 y z$