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The tables below show running hours of three printers that produce greeting cards and the total number of greeting cards produced over three weeks.

Printer B uses $15 in ink every hour. What is the ink cost for each card coming from printer B?

A. $0.30
B. $0.50
C. $1.00
D. $1.50

The tables below show running hours of three printers that produce greeting cards-example-1
User Dfmuir
by
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1 Answer

3 votes

ANSWER

The correct answer is A


Step-by-step explanation



To find the ink cost of each card coming from printer B, we need to find the total cost from printer B and the total number of cards printed by Printer B.


The total hours of all the three printers over the three weeks


=40+45+55+50+50+30+45+40+60=415


The total hours of printer B only


=50+50+30=130


Total number of cards produced over the three weeks



=7950+7800+9600=25350


We can use ratio and proportion to determine the total cards produce by printer B only.



415:25350



130:x


If less, more divides



x=(130* 25350)/(415) \approx7941


Total cost of Printer B in 130 hours

$
=130 * 15=1950


The ink cost


=(1950)/(7941)



=0.2456


$
\approx 0.30

to 2 decimal places

User Travis Weber
by
8.2k points