Answer:
=209.09 mg
Step-by-step explanation:
given: material= radium
half life= 1590 years
initial mass 
=500mg
we know that to calculate the amount left we use
= 
therefore
= 
=209.09058407921 mg
=209.09 mg amount left after 2000 years
No
Hopefully you
Got it correct
I got you because like I gotcha
it’s a wait for five point
To find their average miles per hour we can divide the total miles by the hour used:
4 2/3 ÷ 1 2/3
=4x3+2/3 ÷ 1x3+2/3
=14/3 ÷ 5/3
In division, when we switch the place of numerator and denominator, we can change it to multiplication which makes the calculation easier as we can factorize the numbers.
=14/3 x 3/5
Factorize 3 in both amounts:
=14/1 x 5/1
=14/5
=2.8 miles/hour
Therefore their average speed is 2.8 miles/hour.
Hope it helps!
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