8th Grade Math - Real Numbers, Exponents, Scientific Notation

If the area of a square is 49, what is the length of each side?

• 8
• 15
• 1/2
• 7

Which number is irrational?

• 9.6
• √45
• 3/8
• 3.4 x 10 ⁵

Which number is a rational number ?

• 1/4
• π
• √3
• ∛25

The √20 is between which two integers?

• 2 & 3
• 3 & 4
• 4 & 5
• 5 & 6

Which is the best estimate of the square root of 63?

• 7.1
• 7.3
• 7.5
• 7.9

Simplify (-4r⁵)(2r⁸)

• -8r¹³
• -2r¹³
• -8r⁴⁰
• -2y⁴⁰

Simplify (-5.7)⁰

• 1
• 0
• -1
• -5.7

x^-3

• -3x
• x³
• 1/ x^-3
• 1/ x³

Which is greater,  2654⁰ or 5⁰?

• 2654⁰
• 5⁰
• They are the same
• Zero is greater

Evaluate this expression using the quotient rule.

• 9⁵
• 9⁹
• 1⁵
• 9^-5