A firm produces two types of calculators each​ week, x of type A and y of type B. The weekly revenue and cost functions​ (in dollars) are as follows.   ​R(x,y)=130x+160y+0.02xy−0.08x2−0.03y2        ​C(x,y)=2x+4y+30,000   Find Px​(1300​,1600​) and Py​(1300​,1600​), and interpret the results. Px​(1300​,1600​)=

Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter2: Systems Of Linear Equations
Section2.4: Applications
Problem 27EQ
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A firm produces two types of calculators each​ week, x of type A and y of type B. The weekly revenue and cost functions​ (in dollars) are as follows.
 
​R(x,y)=130x+160y+0.02xy−0.08x2−0.03y2       
​C(x,y)=2x+4y+30,000
 
Find
Px​(1300​,1600​)
and
Py​(1300​,1600​),
and interpret the results.
Px​(1300​,1600​)=
 
 
Choose the correct interpretation of
Px​(1300​,1600​).
 
A.
When selling
1,300
units of type A and
1,600
units of type​ B, the profit will
decrease
approximately
​$54
per unit increase in production of type A.
 
B.
When selling
1,300
units of type A and
1,600
units of type​ B, the profit will
decrease
approximately
​$48
per unit increase in production of type A.
 
C.
Selling
1,300
units of type A and
1,600
units of type B will yield a profit of approximately $48.
 
D.
Selling
1,300
units of type A and
1,600
units of type B will yield a profit of approximately $54.
 
Py​(1300​,1600​)=
 
Choose the correct interpretation of
Py​(1300​,1600​).
 
A.
When selling
1,300
units of type A and
1,600
units of type​ B, the profit will
increase
approximately
​$92
per unit increase in production of type B.
 
B.
Selling
1,300
units of type A and
1,600
units of type B will yield a profit of approximately $86.
 
C.
Selling
1,300
units of type A and
1,600
units of type B will yield a profit of approximately $92.
 
D.
When selling
1,300
units of type A and
1,600
units of type​ B, the profit will
increase
approximately
​$86
per unit increase in production of type B.
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