Question

Which of the following expressions cannot be written as an integer? square root of 49 -3^0 1.2×10^-2 18/3

Answer 1

Answer: 1.2x10^-2

Step-by-step explanation: To begin, we need to recognize the definition of an integer. An integer is a whole number, so it cannot be a decimal.

The square root of 49 is easily 7, so we know that is an integer and not the answer.

-3^0 is a little tricky, but the rule of exponents states that any number with an exponent to the 0 power is always 1, regardless of the number. Being that 1 is an integer, that is not the answer either.

Finally, 18/3 can be simplified to 6, which is also a whole number.

That leaves us with 1.2x10^-2, which when written in our normal notation, is 0.012, and that is NOT an integer.