Answer:
Robyn model makes more sense and Marks is nonsense.
Step-by-step explanation:
In this question ,calculations not required .All we have to do is consider each model logically .
Marks
Marks model shows 20 rather than 2 which means 200 is 10 times as much as 20. It does not make any sense.
Robyn
Robyn model shows 2 which means 200 is 100 times as much as 2 and this is not only correct but also makes sense because 100 *2=200

Thus, options A and D hold, from the simplifications above.
Let's consider the validity of the remaining options provided.




Hence, the correct options that apply are options A, D, E and F
Given:
The logarithmic expression is:

To find:
The equivalent expression of given expression by using change-of-base formula.
Solution:
The change-of-base formula is:

The given expression is:

Using the change-of-base formula, we get

Where, is a constant and c>0.
Let
, then

Therefore, the correct option is a.
Answer:
0.218
Step-by-step explanation:
Answer: x=2
Step-by-step explanation:
Equation: 5x/3-7x/12=13/16
First Simplify Both Sides of the Equation:
5x/3-7x/12=13/6
5/3x+-7/12x+13/6 ( Combine Like Terms)
13/12x=13/6
Next Step Is To Multiply Both Sides with 12/13
(12/13) * (13/12x)=(12/13)*(13/6)
x=2