At Clement's Jr. High School, a student needs an 86 average to earn a B. Sue's average on
1 answer:
Answer:
Sue must score 94 on the final test to earn a B.
Step-by-step explanation:
There are five tests in total.
Sue's average on the first four tests is 84.
If after the final test, she scores X, she will have a B on average of five tests.
We have the following equation:
86 = (4 × 84 + X)/5
<=> X = 5 × 86 - 4 × 84
=> X = 94
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Step-by-step explanation:
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Standard Form:
a) 0.00000678
b) 3170000
Scientific Notation:
a) 6 × 
b) 6.78 × 
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