Tessa received $50 from her Grandma for her birthday. She decided to put this money away and save an additional $12 per week so
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SOLUTION
Given the question in the image, the following are the solution steps to answer the question.
STEP 1: Explain the formula to use
Using the cosine rule which states that:
STEP 2: Write the given sides
STEP 3: Find the value of z
Hence, the indicated length is 4.0