Loading...

#21035

exponential

applications

hard

240 sec

A certain radioactive substance initially had a mass of $1000$ grams. It is estimated that at the end of each hour, the mass of the substance decreases by $20%$ of its mass at the end of the previous hour. According to this model, what is the estimated mass, in grams, of the substance at the end of $3$ hours?

• Up to 5 characters (6 if negative). Only numbers, decimal (.), fraction (/), negative (-).
• Fractions must be in lowest terms.
• Mixed numbers must be converted to improper fractions.