PLEASE HELP ME IT WILL MEAN ALOT TO ME ILL MARK YOU AS A BRILLIANT

Mathematics

1 answer:

jarptica [38.1K]3 years ago

4 0

Answer:

(a) 0.00000221 (b) 4.2 x $10^{5}$

Step-by-step explanation:

(a) $10^{-6}$ means you need to move the decimal left (because of the negative) 6 spaces. So you have 2.21 move the decimal 6 spaces left and you end up with 0.00000221

(b) If you have 420,000 and you count 5 spaces from the last number, that leaves the decimal inbetween the 4 and 2 so your answer will be 4.2 x $10^{5}$

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