Question

please help for a medal...What is the product of 3.4 × 10^−14 and 1.8 × 10^28?
A. 6.12 × 10^14
B. 9.4 × 10^14
C. 5.2 × 10^42
D. 6.12 × 1042

Answer 1

first of all what is 3.4*1.8=?

Answer 2

6.12

Answer 3

yeah

now use the rule:
\[\Huge\bf a^b*a^c=a^{b+c}\]

Answer 4

thus we have 10^-14*10^28=10^{-14+28}=?

Answer 5

in which case a and b would be what?

Answer 6

it is the rule

Answer 7

it applies for all numbers

Answer 8

it gives me 10^14

Answer 9

yeah

so we have 6.12*10^14. so which choice?

Answer 10

A!

Answer 11

yeah

Answer 12

thank you so much you are a hero

Answer 13

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