An estimate for -√66 is A.-6 B.-7 C.-8 D.-9 Is the answer D?

How did you get that answer?

What is 8^2?

64?

-64?

Yes, of course.

-8^2 = 64

OK so than it would be-8 answer c. thank you

You are welcome.

To estimate the value of -√66, we can start by approximating the square root of 66.

The square root of 66 is between the square roots of 64 (which is 8) and 81 (which is 9).

Since we are looking for the negative square root, the estimated value for -√66 would be between -8 and -9.

Among the given options, the closest estimate is -9 (option D). So, yes, the answer is D.