U4 Practice Test

Front

What is a rational number?

Back

A rational number is any number that can be expressed as the quotient or fraction of two integers, where the denominator is not zero.

Front

Is every real number a rational number?

Back

Sometimes true. While all rational numbers are real numbers, not all real numbers are rational (e.g., irrational numbers like √2).

Front

Back

0.001

Front

How do you write 0.0005 in scientific notation?

Back

5 x 10^{-4}

Front

Back

Front

Which of the following numbers is a perfect square: 50, 64, 75, 90?

Back

64

Front

What is the definition of a perfect square?

Back

A perfect square is an integer that is the square of another integer.

Front

What is scientific notation?

Back

Front

How do you convert a decimal to scientific notation?

Back

Move the decimal point in the number until only one non-zero digit remains to its left, counting the number of places moved as the exponent of 10.

Front

Back

0.5