After factor by grouping
we get 
Step-by-step explanation:
We need to factor the term:

Taking c common:

Now making groups:

Now factorizing by groups:

So, after factor by grouping
we get 
Keywords: factor by grouping, factorization
Learn more about factorization at:
#learnwithBrainly
The half done equation would be by+2/3-c=y I forget what you have to do but if you know u can just fix it up from here
Okay well
a(t)= amount of substance remaining after t days
assuming exponential decay, a(t)=29e^-0.1359t
now, find the half, set a(t)= half the original and solve for t
14.5=29e^-0.1359t
0.5=e^-0.1359t
In(0.5)=In(e^-0.1359t)
In(0.5)=-o.1359t
t=in(0.5)/(-0.1359)= (aprox) 5.1 days
Answer: Im pretty sure it is D
Step-by-step explanation: I don't really know how to explain it.
I hope it helps tho ;)
Tell me if im wrong.
Step-by-step explanation:
this is you answer solved.