Answer:
C D
Step-by-step explanation:
How am I suppose to help you if I can’t see the words. It’s too blurry.
Answer:
The rate of decrease is 8%
Step-by-step explanation:
we know that
The general equation for the radioactive decay can be written as:

where
a is the amount in kilograms after time t.
a_0 is the original amount of the substance or y-intercept of the function
r is the decay rate, written in decimals.
t is the time
In this problem we have

so

solve for r

Convert to percentage

Answer:
4/5
Step-by-step explanation:
that is it
7/10 - 1/4 use common denominators
28/40 - 10/40 = 18/40 = 9/20