Question

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Explanation:

Calculate the value of each term in the expanded form

$$ 2 \times 1,000,000 = 2,000,000 $$

$$ 4 \times 100,000 = 400,000 $$

Add the values to find the standard form

$$ 2,000,000 + 400,000 = 2,400,000 $$

Answer:

Scientists approximate that humans first used stone tools around 2.4 million years ago. What is the standard form of this number if the expanded form is \((2 \times 1,000,000) + (4 \times 100,000)\)? <blank>2,400,000</blank>