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Negative Exponents and Scientific Notation 4.8 Quick Check Exercises The following exercises are similar to those in the video section. Work these exercises on your own to test your understanding of the material. 2b −2 . Do not use negative exponents in the answer. a −12 1. Simplify: 2. Convert 5,200,000 to scientific notation. ( )( ) 3. Multiply 2.3 × 107 1.2 ×10−3 and write scientific notation for the result. Negative Exponents and Scientific Notation 4.8 Quick Check Exercise Solutions Please check your answers against the solutions provided below. 2b −2 . Do not use negative exponents in the answer. a −12 1. Simplify: Solution: 2b −2 2a12 = 2 a −12 b 2. Convert 5,200,000 to scientific notation. Solution: 5, 200, 000 = 5.2 × 10m To write 5.2 as 5,200,000, we move the decimal point 6 places to the right. Thus, m is 6 and 5, 200, 000 = 5.2 ×106 . ( )( ) 3. Multiply 2.3 × 107 1.2 ×10−3 and write scientific notation for the result. Solution: ( 2.3 ×10 )(1.2 ×10 ) = ( 2.3 × 1.2 ) × (10 × 10 ) −3 7 7 = 2.76 × 104 −3