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Mathematics, 19.03.2020 08:36 tilsendt

Sandra's scores on the first 4 tests were 87%, 92%, 76%,and 89%. What is the minimum score she needs to make on the fifth test so the her average is at least an 80%?

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Sandra's scores on the first 4 tests were 87%, 92%, 76%,and 89%. What is the minimum score she needs...
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