Quiz 8.1, 8.2, 8.3 most missed

Between which two whole numbers is  $\sqrt{31}$  ?

• 31 and 32

• 5 and 6

• 4 and 5

• 6 and 7

Which statement is NOT true?

•  $2\frac{21}{25}\ =\ 2.84$  

•  $2.84\ x\ 10^{-2}\ >\ 2.84$  

•  $2.84\%\ =\ 2.84\ x\ 10^{-2}$  

•  $2.84\%\ <\ 2\frac{21}{25}$  

• $\frac{1}{25}$

• 0.052

• 1.49 x $10^{-3}$

• 14.9%

What is greater than 9.47 x 10⁴ expressed in standard notation?

• 9,470

• 0.000947

• 947,000

• 94,700

Identify each true statement.

• 3.7 x 10^-2 = 0.37

• 6.1 x 10⁷ = 61,000,000

• 0.00000369 = 3.69 x 10^-6

• 4.02 x 10² = 0.0402

Identify each true statement.

• 2,400 = 2.04 x 10³

• 0.0000012 = 1.2 x 10^-5

• 4.2 x 10⁶ = 4,200,000

Which of the following describes the set of rational numbers?

• Rational numbers is the set of all negative and positive integers.

• Rational numbers is the set of all numbers that can be expressed in the form $\frac{a}{b}$ ; a and b are integers and b is equal to 0.

• Rational numbers is the set of all numbers that can be expressed in the form $\frac{a}{b}$ ; a and b are integers and b is not equal to 0.

• Rational numbers is the set of all numbers that can be expressed as a fraction. The denominator can be equal to zero.

Which set of numbers contain  $\sqrt{2}$  ?

• Rational numbers

• Integers

• Natural numbers

• Irrational numbers

The circumference (C) of a circle can be defined as C =  $2\pi r$  , where r is the radius of the circle. The circumference of the circle can also be described as -

• a whole number

• an irrational number

• an integer

• a rational number

Which of the following sets of numbers contain -1/3?

• whole numbers

• rational numbers

• integers

• irrational numbers

• real numbers