Answer:
Step-by-step explanation:
1. exponential because as the values increase by 1, the y values are multiplied by a factor of 1/2.
2. exponential growth because as the time increase by 20 minutes, the cell amount multiplies by 2.
This is the answer that i was going to upload :
the answer is +5(or)-5 because of root

So; the answer is: A. 5x-2y=1
To find this, turn the word question into an equation.
"One less than" means - 1, which is 1 being subtracted from something.
"half a number" means 1/2x, since 1/2 is half and x is unknown.
"is 12" means = 12, which is something equals 12.
Putting this in order would be 1/2x, then - 1, then = 12.
As an equation, this is 1/2x - 1 = 12.
So the equation is 1/2x - 1 = 12
Now you must find the number by solving this equation.
1/2x - 1 = 12
First, add 1 to both sides.
12 + 1 = 13
1/2x = 13
Now multiply both sides by 2.
This way, x will be isolated since 1/2x • 2 = 1x, and 1x = x.
13 • 2 = 26
x = 26
The number is 26.