In ΔDEF, d = 5.3 cm, e = 2.4 cm and f=4.7 cm. Find the measure of ∠F to the nearest 10th of a degree

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This is what i found “an explicit formula designates the nth term of the sequence, as an expression of n (where n = the term's location). it defines the sequence as a formula in terms of n. this example is an arithmetic sequence(the same number, 5, is added to each term to get to the next term).” i hope this you for what your looking for. can you plz mark me brainliest?