Please help!!! Multiply. Write your answer in scientific notation. (5×10 – 8)(1×103) 20 pts
1 answer:
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Answer:
6.31 mi
Step-by-step explanation:
The diagram below explains the solution better.
From the diagram,
C = starting point of the race.
A = end of the first part of the race.
B = end of the race.
Using Cosine rule, we can find the straight-line distance between the starting point and the end of the race.
Cosine rule states that:
where A = angle A = <A
Given that
b = 5.2 miles
c = 2.0 miles
<A = 115° (from the diagram)
Hence,
The straight-line distance between the starting point and the end of the race is 6.31 mi
The first thing we are going to do to graph our equation is solve them for 
:
For our first equation:
For our second equation:
Now, we just need to use the graphing utility to graph our equations:
We can conclude that the graph of the equations is:
For our first equation:
For our second equation:
Now, we just need to use the graphing utility to graph our equations:
We can conclude that the graph of the equations is: