Answer: The required percentage would be 5.4%.
Step-by-step explanation:
Since we have given that
Worth of Company A = $4150
Worth of Company B = $6820
So, increase in Company A = 6%
increase in Company B = 5%
According to question, it becomes,

So, the total percentage increase in the investor's stock account would be

Hence, the required percentage would be 5.4%.
The value of the quantity after 99 months is 5228.58.
Given that, an initial value = 5900, rate of decay = 0.85% and time period = 7 years.
<h3>What is the exponential decay?</h3>
The quantity decreases slowly after which the rate of change and the rate of growth decreases over a period of time rapidly. This decrease in growth is calculated by using the exponential decay formula.
The exponential decay formula formula is 
Here, the value 
= 5900×
= 5900×0.8862
= 5228.58
Therefore, the value of the quantity after 99 months is 5228.58.
Learn more about the exponential decay here:
brainly.com/question/13674608.
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Given:
• Upper Base of trapezoid = 8 cm
,
• Lower base = 20 cm
,
• Length of one leg (also height) = 5 cm
,
• Length of other leg = 13 cm
Let's find the area of the trapezoid.
To find the area of the trapezoid, apply the formula:

Where:
A is the area
a is the length of upper base = 8 cm
b is the length of the lower base = 20 cm
h is the height = 5 cm
Plug in the values for a, b, and h to find the area, A:

Therefore, the area of the trapezoid is 70 cm^2

Always divide low by high then multiply by 100 to get your answer:
- - Answer: 25%
The answer would be <span>27367895.7325</span>