Answer:
Number 1: 3 hours.
Number 2: $2434.04
Explanation:
3/4 + 3/4 = 1 1/2 (after some simplifying)
1 1/2 + 1 1/2=3. She practiced 3 hours.
Number 2 will be harder to explain. We have 3 sides. That means 90 1/4 x 3. That is 270 3/4. 270 x 8.99 (8.99 per foot) gets us 2427.3, 3/4 x 8.99 (rounded to nearest hundreths) gets us 6.74. We add that together, and we get $2434.04.
I am pretty sure about 1, although not so sure about 2. Hope that helps you.