Well, if each cake takes 2.5 cups, all you need to do is multiply 2.5 x 9 to get your answer!
Time-and-a-half doesn't make enough sense to answer the question. If you fix it, or comment below the correction I will gladly help.
For this case we have that half of the flag was painted blue and the other half yellow.
In addition, a third of the blue half was covered with stars.
So:

A sixth of the flag is blue with stars.
Answer:

Answer:
37.5 cm
Step-by-step explanation:
See attached for reference.
let the diagonal be x,
By Pythagorean formula:
x² = (22.5)² + (30)²
x = √[(22.5)² + (30)²]
x = 37.5 cm
OHHHH I REMEMBER THOSE ITS SO EASY GO TO www.anglesmatter.com and type in that lesson and it shows how to do the work and gives you the answer