Which of the following is a rational number?(1 point)

Question

Responses

7–√
square root of 7

7.8
7.8

π
pi

88√

Answer 1

The only rational number from the options provided is 7.8.

• 7 - √7 (which is approximately 4.35) is not a rational number because it includes the square root of a non-perfect square.
• π (pi) is an irrational number.
• 88√ (which seems to imply \(88\sqrt{}{}\)) is unclear, but if you're implying something like \(88\sqrt{7}\) or similar, that would also be irrational.

Therefore, the answer is 7.8.

Answer 2

is that correct

Answer 3

Yes, that's correct! Among the options you provided:

• 7 - √7 is not a rational number because √7 is irrational, making the entire expression irrational.
• 7.8 is indeed a rational number because it can be expressed as a fraction, specifically \( \frac{78}{10} \).
• π is an irrational number.
• 88√ is ambiguous, but if it refers to any expression involving the square root of a non-perfect square, it would also typically be irrational.

So, the only rational number among your options is 7.8.