# Chapter 5 - Number Theory and the Real Number System - Chapter 5 Test - Page 337: 22

$7500$

#### Work Step by Step

Multiply 3 and 2.5 together and the powers of 10 together to obtain: $=7.5 \times 10^{8+(-5)} \\=7.5 \times 10^3$ The exponent of 10 is positive 3. This means that to convert the scientific notation to standard form, the decimal point has to be moved 3 places to the right. Thus, $7.5 \times 10^3 = 7500$

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