Rationals, roots, and scientific notation

Which of these numbers is an example of an irrational number?

• 3.14

• 3.33333333....

• √7

• √100

What could be considered a definition of a rational number?

• Square roots

• Numbers that are fractions

• Negative integers

• Zero

What’s an example of a perfect square?

• 7.5

• -3

• 49

• π

8^{2 = .... (No calculators!)}

• 8

• 14

• 64

• 48

The number 17 can be considered a:

• Irrational number

• Natural number

• imaginary number

• does not exist

What is the purpose of Scientific notation?

• To add multiplication as an extra step

• To be able to divide by zero

• To more easily write really big or really small numbers

• Prove that rational numbers and irrational numbers are the same

Write 8,700,000 in scientific notation?

• 8.7

• 8.7 x 10⁶

• 8.7 x 10^-6

• 0.00000087

What is 4.9 x 10^-4 in standard notation?

• 4.9

• 49

• 0.049

• 0.00049

What is wrong with this? 65.9 x 10²³

• Nothing is wrong

• Exponent is too large

• the coefficient needs to be between 1 and 10

• No number of that size exists

No calculators! The square root of 75 must be between:

• 8 and 9

• 64 and 81

• 216 and 343

• 0 and 1