What is scientific notation?
a. it is a way to abbreviate very large or very small numbers.
o
b. it is a special way of writing that looks scientific.
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c. it is writing scientific summaries in a journal.
d. it is a way of making numbers scientific.

Henry, whose mass is 95 kg, stands on a bathroom scale in an elevator. the scale reads 830 n for the first 2.4 s after the elevator starts moving, then 930 n for the next 2.4 s. part a what is the elevator's speed 4.8 s after starting? express your answer with the appropriate units.