ACT 2019 June(B02) Math Question 15 Explanation - ACT Helper

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2019 June(B02) Math Question 15
Exponents, Radicals, & Scientific Notation
- Exponent Expressions
Choice D
This special savings account will double every 5 years.
$∵ 40 y e a r s = 5 y e a r s \times 8$
Therefore, this account will double 8 times.
$$ 2000 \times 2^{8} = $ 2000 \times 256 = $ 512000$
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