\begin{cases}b(1)=-54 b(n)=b(n-1)\cdot \dfrac{4}{3} \end{cases}
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b(1)=−54
b(n)=b(n−1)⋅
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5/6+7/8what is the answer sealsdbdbshd

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?

Urgent? will give brainliest given that the blue triangle is a right triangle, which expression correctly gives the area of the red square? a) a2 + b2 b) a2 - b2 c) a2 - c2 d) c2 - a2