A coral reef is 2 miles due south of its closest point along a straight shoreline. A visitor is staying in a cabin that is 4 miles west of that point. The visitor is planning to go from the cabin to the coral reef. Suppose the visitor runs at a rate of 6 mph and swims at a rate of 3 mph. How far should the visitor run to minimize the time it takes to reach the coral reef

5.54 miles

Step-by-step explanation:

1. Assume she runs up to a point that is x miles to the east of the coral reef:

distance running =

distance swimming =

2. Times:

time= distance / speed

time running =

time swimming =

3. Total time

time running + time swimming:  

4. Minimize time

The minimum time is when the derivative of the function of time is zero.

Find the derivative of T(x), using rule of the sum, the derivative of the sum is the sum of the derivatives, and the chain rule:

Solve for x:

5. Distance the visitor should run to minimize the time

Hence, the visitor should run 5.54 miles.

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step-by-step explanation:

first you take the 6 dollars and add 10 to it then add the 50 to that then multiply by 8 with xy and your answer will be

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