A clerk can file cards at the rate of 120 cards per hour. He has a total of 900 cards to file. How many cards remain to be filed after 6 hours?
rate is 120 cards per hour y=120x
y=120(6)
120(6)= 720
he files 720 cards after 6 hours
so 900-720= 180
180 cards left to file
To find out how many cards remain to be filed after 6 hours, we need to calculate how many cards the clerk has filed in 6 hours and then subtract that number from the total number of cards.
First, let's calculate how many cards the clerk can file in 1 hour: 120 cards per hour.
Next, we can calculate how many cards the clerk can file in 6 hours: 120 cards/hour × 6 hours = 720 cards.
Finally, to find out how many cards remain to be filed after 6 hours, we subtract the number of cards filed (720 cards) from the total number of cards (900 cards): 900 cards - 720 cards = 180 cards.
Therefore, after 6 hours, there are still 180 cards remaining to be filed.