The diagram illustrates a decorative lamp that is suspended from a ceiling by two strings. the first string is 43 centimeters long and makes a 50° angle with the horizontal. the second string is 35 centimeters long and makes a 70° angle with the horizontal. what is the distance between the points of suspension of the strings on the ceiling?
25.0 centimeters
38.3 centimeters
39.6 centimeters
42.4 centimeters

The answer is 39.6 centimeters.
This can be done by using cosine law.

First, think of what you know. you know that the number t the end of the equation will need to be subtracted because it is the money he lost from buying the lawn mower. and your first two weeks have negative profit, so that tells you that c and d are wrong. now you can plug any of the weeks into a and b to see which one works. i'll start with plugging week 1 into a.this isn't right because it says your answer for week one should be -90.so now we need to try the same thing with b.this one got you the right answer, (sometimes if you only check with one of the weeks multiple will work so you need to check with more of the weeks, but it worked out fine here)this means that b is the correct answer.let me know if you need more clarification. i hope this : )