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c) For the high jump, each competitor receives multiple opportunities to clear the bar at each height. On average, Shane completes 3 out of 3 jumps on the lowest bar, 5 out of 6 jumps on the middle bar, and 3 out of 4 jumps on the highest bar. What is
Shane’s overall average number of jumps completed? (2 points)

d) If Shane’s average number of jumps completed is greater than one-half, then the eighth graders earn 50 points. Which grade should be awarded 50 points**? (1 point)

User Bill Brooks
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1 Answer

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22 votes

Answer:

c) To find Shane's overall average number of jumps completed, we need to add up the total number of jumps he completed at each height and divide by the total number of jumps he attempted.

At the lowest height, Shane completed 3 out of 3 jumps, for a total of 3 completed jumps.

At the middle height, Shane completed 5 out of 6 jumps, for a total of 5 completed jumps.

At the highest height, Shane completed 3 out of 4 jumps, for a total of 3 completed jumps.

In total, Shane completed 3 + 5 + 3 = 11 jumps out of a total of 3 + 6 + 4 = 13 jumps attempted.

His overall average number of jumps completed is 11 / 13, or approximately 0.85 jumps.

d) Since Shane's average number of jumps completed is greater than one-half (0.5), the eighth graders should be awarded 50 points

Explanation:

For your other question A and B for A Correct! To find the total distance thrown by Claire and Grace, you first converted the mixed numbers 5/8 and 3/5 to fractions with a common denominator (in this case, 40), then added those fractions together to find the total distance in fraction form. Finally, you converted the fraction 49/40 back to a mixed number and added it to the whole number distances thrown by Claire and Grace to find their total distance.

The total distance thrown by Claire and Grace is 82 feet 9/40 inches, or approximately 82.225 feet. For B also Correct! Since the total distance thrown by Claire and Grace is not greater than 83.7 feet, the eighth graders should be awarded 50 points.

User Klevison
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2.1k points
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