A
rational number is any number that can be written as the
ratio between two other numbers i.e. in the form

Part A:
An easy choice that makes sense is 7.8, right in the middle. To prove that it's rational we need to write it as a ratio. In this case we have

Part B:
We need a number that can't be written as a ratio (because it neither terminates nor repeats). Some common ones are

,

,

and

so it makes sense to try and use those to build our number. In this case

works nicely.
Answer:
Z €{9, i can right a fraction but on top is 9 below is 4}
Step-by-step explanation:
Answer:
Time in seconds when the ball is 4 feet above the ground is:
t= 0.6 and 2.9.