The value of.a telephone calling card decreases 20cents forma each minute used. Write en integer to express the change un the cards value for a 4 minute call.
The value of a telephone calling card decreases 20cents for each minute used. Write an integer to express the charge in the card value for a 4 minute call.
To find the change in the calling card's value for a 4-minute call, we need to calculate how much the value decreases per minute and then multiply it by the number of minutes used.
Given that the value decreases 20 cents for each minute used, we can represent this decrease as -20 cents per minute. The negative sign indicates the decrease in value.
To find the change in value for a 4-minute call, we multiply the decrease per minute (-20 cents) by the number of minutes used (4 minutes):
Change in value = (-20 cents/minute) × (4 minutes)
Change in value = -80 cents
Therefore, the integer that represents the change in the calling card's value for a 4-minute call is -80 cents.