Which two square roots are used to estimate√8? a. √2 and √3 b. √3 and √4 c. √4 and √9 d. √9 and √16 which two square roots are used to estimate √42 a. √25 and √36 b. √36 and √49 c. √49 and √64 d. √25 and √64

Option C.

Option B.

Step-by-step explanation:

By definition, the square of a number is that number times itself.

The square root of a perfect square is a whole number.

Since the square root of another number (not perfect square) is not a whole number, you can estimate it finding two perfect square roots that number is between.

1) Observe that 4 and 9 are perfect squares:

And 8 is between those numbers.

Therefore, the square roots and are used to estimage

2) Notice 36 and 49 are perfect squares:

And 42 is between those numbers.

Therefore, the square roots and are used to estimage

15%

step-by-step explanation:

use the table and count the number of guesses that has two correct answers.

the following are two correct answers

10010, 01100, 11000

a total of 3 numbers having 2 correct guesses out of 20 questions.

probability of getting 2 correct guesses = the number of questions getting 2 correct answers / total number of questions.

= 3/20

to convert it into percent multiply by 100, we get

= 3/20 * 100

= 15%

the answer is 15%

you.