Answer:
r = 21
Step-by-step explanation:
nth of sequence P :

: 
The equation which is equivalent to
is
or x = 6 (
).
<u>Step-by-step explanation:</u>
Given Equation:

As we know, in terms of logarithmic rules, when b is raised to the power of y is equal x:

Then, the base b logarithm of x is equal to y

Now, use the logarithmic rule for the given equation by comparing with above equation. We get b = x, y = 2, and x = 36. Apply this in equation,


When taking out the squares on both sides, we get x = 6. Hence, the given equation can be written as 
Answer:
Hello your question lacks the required options here are the options
By blocking on stopping distance
By blocking on tire tread type
By blocking on automobile type
By blocking on automobile size
Without blocking
Answer : By blocking on automobile size
Step-by-step explanation:
The experiment can best be conducted by blocking on the automobile and this is because the Automobile size and the stopping distance are proportionally related (associated ) as seen from the previous experiments hence the best experiment is By blocking on the size of the automobile is very crucial .
we can have a symmetric tread tire or an asymmetric tires fixed on the different types of Automobiles simultaneously and see if the stopping distance will be affected when we change the tires that way we are blocking on the Automobile size the same type of tires will be fixed at the same time on each automobile size