Test - OK Mastering the OSTP in Grade 8 math Chapter 2

1 pt

$(1 \times 10^{7}) \times (5 \times 10^{21}) =$

$2 \times 10^{15}$

$2 \times 10^{27}$

$2 \times 10^{147}$

$2 \times 10^{28}$

1 pt

$(2.8 \times 10^{8}) \div (7 x 10^{5})$

$4 \times 10^{12}$

$4 \times 10^{2}$

$4 \times 10^{35}$

$4 \times 10^{1.4}$

1 pt

$\frac{10^{- 6}}{10^{- 4}} \times \frac{10^{- 7}}{10^{- 3}}$

$10^{- 6}$

$10^{6}$

$10^{- 7}$

$10^{7}$

1 pt

Which expression is closest to $(9.81 \times 10^{- 3}) \times (3.75 \times 10^{- 41})$

$3.68 \times 10^{- 43}$

$3.68 \times 10^{- 44}$

$1.07 \times 10^{- 49}$

$3.68 \times 10^{39}$

1 pt

Select the correct order for the following numbers from least to greatest.

$1.1 \times 10^{10} 1.01 \times 10^{9} 1.11 \times 10^{3}$

$1.01 \times 10^{9} 1.11 \times 10^{3} 1.1 \times 10^{10}$

$1.01 \times 10^{3} 1.11 \times 10^{9} 1.1 \times 10^{10}$

$1.01 \times 10^{10} 1.11 \times 10^{3} 1.1 \times 10^{9}$

$1.01 \times 10^{10} 1.11 \times 10^{9} 1.1 \times 10^{3}$

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