Re-arranging the inequality to find the test points:

This means, we need to test the inequality for x = -10, x = 0 and x = 7
Since question assumes that x > 0, so we ignore the values less than 0.
So the test points are x = 0 and x = 7
At x = 0 the expression is undefined.
Between x = 0 and x = 7 the value of expression

is negative. At x = 7 the value of expression is 0. Above x = 7 the value of expression is positive.
So, the solution to the given inequality will be 0 < x < 7.
In Interval notation, the solution can be written as
(0,7)
Answer:
the answer is B. 3.87
Step-by-step explanation:
Answer:
C) $90.48
Step-by-step explanation:
72.39*.2=14.478
72.39*.05=3.6195
14.478+3.6195=18.0975
18.0975+72.39=90.4875
A mixed number is an addition of its whole and fractional parts.
2
+
1
3
Add
2
and
1
3
.
Tap for more steps...
7
3
The result can be shown in multiple forms.
Exact Form:
7
3
Decimal Form:
2.
¯
3
Mixed Number Form:
2
1
3
Answer:
8 hours
Step-by-step explanation:
We have that;
B = number of bacterial cells, B, in a container after t hours
t = time taken in hours
The function is;
B=25x2t
Where B = 400 bacterial cells
400 = 25x2t
t = 400/25x2
t = 8 hours