First you to eliminate i from denominator.
mult by (7+3i) above and below
=(49+42i-9)/(49-9)
which is (40+42i)/40 which can simplify
3w+12
I have attached a photo of how to solve these problems
Hello There!
How many miles is 1000 feet?
1000 feet = 0.189394 miles
How many miles is half a kilometer?
0.5 kilometers = 0.310686 miles.
Hope This Helps You!
Good Luck :)
- Hannah ❤
Answer:
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.
please mark me brainliest!
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Hope this helps you buddy!:)
