Answer:
Option 1 - X = 9
Step-by-step explanation:
The solution to this equation, x - 15 = - 6
Solving the following,
Step 1: x - 15 = -6
Replace all the numerical values in one side and x digits on the other side
Step 2: x = -6+15
Step 3: x = 9
Therefore, the value of x is 9.
Using logarithm, the following equation will apply:
Y = P * [1 + z]^x
Where Y = 2000
P = 100
z = 5% = 0.05
x is the quantity we are calculating for
The equation becomes
2000 = 100 * [1+ 0.05]^x
Dividing both side by 100, we have
20 = 10 * [ 1 + 0.05]^x
Taking the log of both sides, we have
Log 20 = Log [1 + 0.05]^x
log 20 = x * log 1.05
x = log 20/ log 1.05 = 61.40
Thus, it will takes 61.40 minutes for the number of cells in the petri dish to reach 2000.
Answer:
4 it would go back in order
Step-by-step explanation:
To solve this we are going to use the simple interest formula:

where

is the final amount.

is the initial investment.

is the interest rate in decimal form.

is the time in years.
Investment A. We know that the initial investment is $10,000, so

. We also know that the number of years is 5, so

. To convert the interest rate to decimal form, we are going to divide the rate by 100%

Lets replace those values in our formula to find

:


Investment B. 
,

, and

.



We can conclude that
investment A will be worth than investment B at the end of the investment period.