James needs to bring his grade up to a B (80) in reading. What does he need to get on his next quiz?
Quiz 1:77
Quiz 2:81
Quiz 3:74
Quiz 4:?
4 * 80 = 320
77 + 81 + 74 = 232
320 - 232 = 88
2+98
which of the following gases was most likely present in the earths earliest atmosphere
a. nitrogen
(b. hydrogen)
c. argon
d. oxygen
To determine the score James needs on his next quiz to bring his grade up to a B (80), we can follow these steps:
Step 1: Calculate the average of the current quiz grades.
The average of James' quiz grades can be obtained by adding up all the quiz scores and dividing the sum by the number of quizzes.
Quiz average = (Quiz 1 + Quiz 2 + Quiz 3) / 3
Quiz average = (77 + 81 + 74) / 3
Quiz average = 232 / 3
Quiz average ≈ 77.33
Step 2: Determine how much James needs to achieve an 80 average.
To get a B grade (80), James needs an average score of 80 for all his quizzes. Since we know his current average is approximately 77.33, we need to calculate the difference.
Difference = Desired average - Current average
Difference = 80 - 77.33
Difference ≈ 2.67
James needs to increase his average by approximately 2.67 points to reach a B grade (80).
Step 3: Calculate the score James needs on his next quiz.
Since James has already taken Quiz 4 and we don't know his score, we have to determine what score on Quiz 4 would help him reach his desired average of 80.
Quiz 4 score = Difference + Current average
Quiz 4 score ≈ 2.67 + 77.33
Quiz 4 score ≈ 80
Therefore, James needs to get approximately 80 on his Quiz 4 to bring his grade up to a B (80).