Answer:
like write an equation? If so it's a 0 slope
Step-by-step explanation:
Answer:
The first choice:
,
, and
.
Step-by-step explanation:
.
Add the first row to the second row to obtain:
.
Simplify that matrix to obtain:
.
Divide the second row by
:
.
Hence,
.
Subtract the current row two from row three:
.
Simplify that matrix to obtain:
.
Invert the signs in the third row and divide it by
to obtain:
.
Hence,
.
Subtract two times the current second row from the first row to obtain:
.
That simplifies to
.
Subtract the current third row from the first row to obtain:
.
That simplifies to
.
Invert the signs in the first row to obtain:
.
Hence,
.
.
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:
B
Step-by-step explanation:
Yes they are proportional
Formula:
-20/-15 = x/6
If you solve this equation for x it should evaluate to x = 8 which indicates it is proportional.
Notice the position of -20, -15, 6, and 8 in the chart and in the fraction