Interactive practice questions
For the following table, compute the mass of $800$800 grams of radioactive element $D$D left each day if element $D$D loses half its mass every day.
| Day | Mass of radioactive element $D$D (g) |
|---|---|
| $0$0 | $800$800 |
| $1$1 | $\editable{}$ |
| $2$2 | $\editable{}$ |
| $3$3 | $\editable{}$ |
| $4$4 | $\editable{}$ |
What type of decay is this?
Linear decay
Exponential decay
Suppose you save $\$1$$1 the first day of a month, $\$2$$2 the second day, $\$4$$4 the third day, $\$8$$8 the fourth day, and so on. That is, each day you save twice as much as you did the day before.
Suppose you save $\$1$$1 the first day of a month, $\$2$$2 the second day, $\$4$$4 the third day, $\$8$$8 the fourth day, and so on. That is, each day you save twice as much as you did the day before.
A car enthusiast purchases a vintage car for $\$220000$$220000. Each year, its value increases at a rate of $12$12 percent of its value at the beginning of the year. Find its value after $7$7 years, to two decimal places.