Answer:
C.
; 48 strands of bacteria
Step-by-step explanation:
Fred placed 3 strands of bacteria in a petri dish.
The bacteria strands double every hour.
Formula : y = ab^x
Where a is the initial value
b = growth rate
x = hours
So, A formula to represent how many bacteria strands are present at the nth hour : 
Now we are supposed to find how many strands of bacteria are present at 4 hours.
Substitute the value in the formula :
f(4)=48
Hence 48 strands of bacteria are present at 4 hours.
Answer is B, they are 5 time zones apart
Answer:
30.
Step-by-step explanation:
The total degree of a triangle is 180.
They give you 60.
The center line coming down creates a 90 degree angle.
So 60+90=150.
180-150=30.
So the top angle is 30 degrees on both sides.
Given :
A linear equations :
3x+4y = 8 .
She have completed the following steps :
3x+4y = 8
3x+4y-3x = 8-3x
4y = 8 -3x
To Find :
The equivalent equation which solves for y.
Solution :
General equation of line or equation which solves for y is given by :
y = mx +c
So , our next step should be dividing both sides by 4 .
Therefore , equation which solves for y is 
.
Hence , this is the required solution .
