Question 1

Which choice is an irrational number?

Accepted Answer

$\sqrt{18}$

Answer

21.989

Answer

$\frac{4\pi}{\pi}$

Answer

$\sqrt{6^2}$

Question 2

Which number is irrational?

Accepted Answer

$\sqrt{5}$

Answer

$\sqrt{49}$

Answer

$\sqrt{144}$

Answer

$\sqrt{1}$

Question 3

Which expression is equivalent to $\frac{(7^2)^5}{(7^{-2})(7^8)}$?

Accepted Answer

$7^4$

Answer

$7^0$

Answer

$7^{26}$

Answer

$7^1$

Question 4

What is the value of $-4^3\div(2^2)^2$?

Accepted Answer

-4

Answer

$-\frac{3}{4}$

Answer

$-1\frac{1}{2}$

Answer

-8

Question 5

The minimum distance from Earth to a certain planet is about 365 million miles. How is this distance written in scientific notation?

Accepted Answer

$3.65	imes10^8$

Answer

$3.65	imes10^7$

Answer

$36.5	imes10^6$

Answer

$365	imes10^6$

Question 6

The width of a human hair is approximately 0.0018 cm. What is the width of a human hair written in scientific notation?

Accepted Answer

$1.8	imes10^{-3}$

Answer

$1.8	imes10^{-2}$

Answer

$1.8	imes10^{-4}$

Answer

$1.8	imes10^{-5}$

Question 7

Which expression is equivalent to $\frac{6	imes10^{-4}}{2	imes10^3}$?

Accepted Answer

$3	imes10^{-7}$

Answer

$3	imes10^{7}$

Answer

$3	imes10^{1}$

Answer

$3	imes10^{-1}$

Question 8

One penny weighs about $8.82	imes10^{-2}$ ounces. How much do 50 pennies weigh?

Accepted Answer

4.41 ounces

Answer

441 ounces

Answer

44,100 ounces

Answer

44.1 ounces

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