Because it is much easier to identify the place values when multiplying numbers. You can immediately sight the numbers to be multipied.
An example
10
x 5
___
0
Then
5 -0= 50
Answer:
y=-3 is the correct answer
Answer:

Step-by-step explanation:
Given
-- Initial population
--- Rate
Required
Determine the population in 8 years
The question shows an exponential distribution and the final population will be calculated using:

Where x is the number of years.
So, we have:

Convert % to decimal


(b) is correct
5/x² = 5x⁻²
Hope I helped.
Answer:
15
Step-by-step explanation:
a²+b²=c²
12²+9²= 144+81=225²
√225 = 15