The irrational number is 7.8. It is irrational because it does not terminate or repeat
We can't answer the question, you haven't given us the information, we need to know what the x is here, or if they gave you a value.
9 is in the hundred thousands place, 8 is in the ten thousands place, 7 is in the thousands place, 1 is in the hundreds place, 6 is in the tens place, 4 is in the ones place.
Answer:
4500
Step-by-step explanation:

25% can be made in to 100% by multiplying it by 4.
Therefore, we can find the answer by multiplying 80 by 4.
80 * 4 = 320