Answer:
179 minutes
Step-by-step explanation:
- Divide both sides by 75.5 to see how many minutes it would take to drive 1 mile. (54 / 75.5) =108/151
- She can drive 1 mile in 108/151 minutes
- Times by 250. (108/151 * 250) 178.8
- 179 to nearest minute
Given:
The equation of circle is

To find:
The polar form of given circle.
Solution:
We have,

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Subtracting 9 from both sides, we get

We know that,
and
.


and 
We know that, r is radius it cannot be 0. So,


Therefore, the correct option is A.
Answer:
Average of the draws equals 420
Standard Error = 11.88
Step-by-step explanation:
Given



Solving (a): The average of the draws
This implies that we calculate the sample mean
This is calculated as:
--- Sample Mean = Population Mean
So, we have:

Solving (b): The standard error
This is calculated as:

So, we have:

Using the calculator, we have:

Step-by-step explanation:
1 km = 1000 m
(hence the term "kilo" which means 1000).
so. he runs 1000 m at the rate of 3 minutes per km, that means 3 minutes per 1000 m.
now, we can see the solution already with our eyes.
but let's do it formally :
the rate or ratio between time and distance must be the same for the same speed.
so,
3 min / 1000 m = x min / 500 m
500 m × 3 min / 1000 m = x min
1/2 × 3 min = x min
3/2 = 1.5 min = x min
so, it takes him 1.5 minutes (90 seconds) to run 500 m.
The answer to the question