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3 years ago

Multiply (2.5 x 10 ^-8) ( 9x10 ^ - 10 ) Express answer in scientific notation

Mathematics

2 answers:

abruzzese [7]3 years ago

7 0

when you multiply scientific notation numbers add the exponents ( -8 + -10 = -18)

now multiply 2.5 *9 = 22.5

so you now have 22.5x10^-18

now make 22.5 a real scientific number by moving the decimal point 1 place to the right, which subtracts 1 from the exponent

so you get:

2.25x10^-17

earnstyle [38]3 years ago

4 0

2.25 x 10^-17. Because it's negative you move the decimal to the left. So 2.5 x 10^-8 is .000000025 and 9 x 10^-10 is .0000000009.

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