1. There are 30 quarters and 15 dimes.
2. The triangle has an area of 84 square units.
3. The speed of the current is 1 mph.
4. The polygon has 90 sides.
5. The last two digits are 76.
6. The solutions are x = e^√e and x = e^−√e
7. The probability is 5/648.
8. There are 9·10⁴ − 8·9⁴ = 37512 such numbers.