8th grade

Which one of the numbers Gary wrote represent a rational number?

• √40

• √49

• √122

• √77

Mr. Harris wrote four sets of numbers for his students. Which set represents irrational numbers?

• {1, 5, −√16, 25/5}

• {−1.33̅, −0.56, 2.75,

  7.17}

• {−3, −1, 0, 4}

• {-2.457..., π, √11, √24}

Billy and Kimberly were working on their homework. Billy said 45/5

is a natural number. Kimberly said it is a

rational number. Who is correct? Why?

Where should − √169 be placed in the Venn diagram?

• Rational numbers, because − √169 is equal to −84.5.

• Integers, because

  − √169 is equal to −13.

• Irrational numbers, because − √169 is equal to −84.5.

• Whole numbers, because − √169 is equal to 13.

Is Jill's statement correct? Why or why not?

Raul records the deposit and withdrawal transactions in his checking account.

$7.50, -$25.30, $27.14, -$12.82, -$4.96.

Which list shows these transactions in ascending order?

• - $25.30, - $4.96, -$12.82, $7.50, $27.14

• $7.50, - $25.30, $27.14, - $12.82, - $4.96

• - $25.30, - $12.82,

  - $4.96, $7.50, $27.14

• $27.14, $7.50, - $12.82, - $4.96, - $25.30

The length of a micrometer is approximately 0.00003937 inches. How is this number written in

scientific notation?