We don't know much she used or had at the start
Answer:
Approximately 2.2 seconds
Step-by-step explanation:
5/4*80=100
100/45=2.2 seconds
Add the #s
Count the #s
Divide the #s
Area of a triangle is equal to 1/2 b(h) so since you already have the height and base, all you need to do is input it back into the equation:

(10)(13)
Multiply 10 & 13 to equal

(130)
Then take half of 130 to get
A = 65