Answer:
assuming the comma is meant to be a decimal...
It would be 2.9
Step-by-step explanation:
the place right after the decimal is the tenth place. the 5 rounds up the 8. don't worry about the 2. so the 8 becomes a 9 and you leave off the rest because you are only worrying about the tenths place.
Answer:
7x+28/5
Step-by-step explanation:
:)
Answer:
123-98248294
4380583058903
3095804305394580
-0
Step-by-step explanation:
Answer:
0.50 kg of the material would be left after 10 days.
0.25 kg of the material would be left after 20 days.
Step-by-step explanation:
We have been given that the half-life of a material is 10 days. You have one 1 kg of the material today. We are asked to find the amount of material left after 10 days and 20 days, respectively.
We will use half life formula.
, where,
A = Amount left after t units of time,
a = Initial amount,
t = Time,
h = Half-life.




Therefore, amount of the material left after 10 days would be 0.5 kg.





Therefore, amount of the material left after 20 days would be 0.25 kg.
<span>rotated 90° about the origin
(x,y) = (-y, x)
so </span><span>(5, -2) is rotated 90° about the origin = (2, 5)
answer
</span><span>b.(2, 5)</span>