Math 1 · Unit 8 · Lesson 5 · part 5 of 5
Practice Problems
Try them, get help one step at a time, then print how it went.
Practice: try it, then get help one step at a time
Factors and rates in both directions, growth and decay mixed, then what-if and how-long questions. Hint says start from 1, which is keeping all of it, Show next step shows one worked step at a time with the calculator keys, Reveal answer checks, and Hide help / start over clears the card.
My results
Finished the practice? Print a page that shows each question, what you typed or chose, the correct answer, and how it went. Good for showing a teacher or keeping in a folder.
Exit ticket
On paper or an index card. Use the math word and the plain-English word.
- A factor of 0.92: growth or decay, and what rate? A factor of 1.08?
- A $20,000 car loses 15% a year. Write its value after t years and find the value after 2 years.
- A city is 8,000(1.04)t. What changes if the rate is 6%? If the start is 12,000?
- About how long does money take to double at 6%? How would you find it exactly?
Check your exit ticket
- 0.92 = 1 − 0.08: loses 8%. 1.08 = 1 + 0.08: grows 8%.
- 20000(0.85)t; 20000 × 0.7225 = $14,450.00.
- 6%: same start, the gap widens every year. 12,000: every value is 1.5 times bigger.
- About 12 years (72 ÷ 6). Build a table and find the first year the balance is double.