What's scientific notation

Pls pls pls pls ! describe, in your own words, how you found the epicenter of the earthquake.

Suppose you have three polarizing filters, with the second at an angle of 42∘ to the first and the third at an angle of 90∘ to the first. by what perfect will the original intensity of unpolarized light be reduced to after passing through all three filters?

How can a cyclist's acceleration change even if its velocity remains constant?