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Question
Find the square root of 0.81.
(1 point)
Responses
0.9
9
0.09
0.0009
0.9
To find the square root of 0.81, you can use a calculator or estimate the answer.
To find the square root of 0.81, you can use a calculator or a mathematical method. Let's explain both ways:
Using a calculator:
1. Type in 0.81 on your calculator.
2. Find the square root button (√) on your calculator and press it.
3. The calculator will give you the answer, which should be 0.9.
Using a mathematical method:
1. Start by writing down the number 0.81.
2. Guess a number, let's say 0.5, as a possible square root of 0.81.
3. Multiply the guess by itself: 0.5 * 0.5 = 0.25.
4. Since the result (0.25) is less than 0.81, we need to guess a higher number.
5. Try a higher guess, such as 0.8, and repeat the process.
6. Multiply the new guess (0.8) by itself: 0.8 * 0.8 = 0.64.
7. Since the result (0.64) is still less than 0.81, we need to keep increasing our guess.
8. Continue this process until you find a number whose square is greater than 0.81.
9. Eventually, you will find that a guess of 0.9 works.
10. Multiply 0.9 by itself: 0.9 * 0.9 = 0.81.
11. Therefore, the square root of 0.81 is 0.9.
So the correct answer is 0.9.