Determine whether this is rational or irrational?

Question

1. √77 rational or irrational
2. √- rational or irrational
3. √121 rational or irrational
4. -4√16 rational or irrational

Answer 1

1.irrational-it goes out to 11 and 7 which are both prime
2.irrational-impossible to tell.
3.rational-11
4.rational-6

Answer 2

Irrational. that's sqrt(7)*sqrt(eleven). The sq. root of a unfavorable image is neither rational nor irrational. that's imaginary. The triangle is isosceles and the backside is chop up in a million/2 via the altitude. 5^2 + x^2 = 13^2. anybody knows 5,12,13 is a Pythagorean triple, so this may well be a no brainer. The cube root of sixty 4 is 4. 4x4x4 = sixty 4 So cube root of a million/sixty 4 is a million/4

Answer 3

A number is irrational if it is an non-terminating, non-repeating decimal...
and a rational number is just the opposite.

A classic example of an irrational number is pi. 3.14159.....it keeps going on forever with no pattern.

A rational number is either a whole number or a decimal with a pattern. Ex: 1/3 or .333...

Answer 4

the square root of 121 is rational - the answer is 11

the square root of -1 is irrational- it is i

and im too lazy to look at the other 2

Answer 5

Its been a long time but if I remember correctly they are all rational except for #2.

Answer 6

√(-1) is neither rational nor irrational; it is imaginary.
.

Answer 7

1.rational
2.irrational
3.rational
4.irrational