Keith purchase a prepaid prepaid phone card for $20 cost cost $0.07 a minute using this car the credit scenes are left on the card after it has used minutes of calls again by the following C equals 20.00 - 0.07 X how much credit is left on the card after keep using it for 40 minutes of calls

5

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answer: r there any options?

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n=1.75+1.75

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3.5/2=1.75

the above table 1 will calculate the population size (n) after a certain length of time (t). all you need to do is plug in the initial population number (no), the growth rate (r) and the length of time (t). the constant (e) is already entered into the equation. it stands for the base of the natural logarithms (approximately 2.71828). growth rate (r) and time (t) must be expressed in the same unit of time, such as years, days, hours or minutes. for humans, population growth rate is based on one year. if a population of people grew from 1000 to 1040 in one year, then the percent increase or annual growth rate is 40/1000 x 100 = 4 percent.

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