100 is equal to

, So, when you multiply the scientific notation by 100, you should add 2 to the exponent of 10 in
that scientific notation:
For example;

=

=

=
20% of 2100 is 420
So the tax is $420
Then 2100-420= 1680
So he has $1680 left after paying the tax.
Answer:

Step-by-step explanation:

Given:
Substitute the given value into the formula and solve for r:









Answer:
4800 beats an hour
Step-by-step explanation:
there are 60 minutes in and hour
the heart beats 80 times per minute( that is actually a very high heart rate)
80*60=4800 per hour
Answer:
;FIHI;IHFHGILSOUDHFUHZSIUDGNJKZNSFJGNOSHTJOIJOIGJOSKFNGKNSJKGNONOJGOKJN
Step-by-step explanation: