type cos(155) into a calculator
cos(155)= -0.906307787...
Answer:

Step-by-step explanation:
From the question the emerald was located at a depth which is between -1/2 and -1 2/3 meters
This statement can be written as

To get the depth, you find the depth of the emerald location, you find difference between the two mentioned depths

Change first term to improper fraction

Find the LCM to solve the operation the involves the fractions.The Least common multiple here is 6 i.e 3*2


The number that could represent the depth at which the emerald was located is

Answer:
poop
Step-by-step explanation:
Ok so our original fraction is:

To simplify this fraction, look for instances where the values on the top and bottom can be reduced:
For example, 36 over 6 is the same as 6 over 1, so we can simplify the fraction so it is:

We can also eliminate the denominator by dividing the nominator by x^9 so:


And that is the simplified answer of the fraction
Hope this helped