Find the widest range of scores that you can get on a final exam in order to receive a grade of B for the class. Using interval notation

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Find the widest range of scores that you can get on a final exam in order to receive a grade of B for the class Using interval notation Need answer asap class=

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Answer:

Correct choice is B

Step-by-step explanation:

Let x% be your final test score, then the average of all test scores is

[tex]\dfrac{96+77+74+x}{4}.[/tex]

Since you must have an average between 80% and 89%, then

[tex]80\le \dfrac{96+77+74+x}{4}\le 89,\\ \\320\le 247+x\le 356,\\ \\73\le x\le 109.[/tex]

X is measured in percent, then the greatest value of x can be 100%. You get that

[tex]73\%\le x\le 100%.[/tex]

Answer:

[73, 100}

Step-by-step explanation:

96 + 77 + 74 + 65 = 312

312/4 = 78

96 + 77 + 74 + 70= 317

317/4 = 79.25

96 + 77 + 74 + 73 = 320

320/4 = 80

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