<h3>answer. she can grade 72 papers in 8 hours</h3>
Explanation:
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Answer;
A. The curl-up only tests the endurance of the abdominal muscles, not their strength
Explanation;
Curl up test measures abdominal strength and endurance. This test focuses predominantly on the main abdominal muscle, the rectus abdominus, and may not evaluate the core as a whole.
This test requires the athlete to complete as many curl-ups as possible at a rate of 20/minute. This test provides a means to monitor the effect of training on the athlete's physical development.
The percentage decrease in profit to the nearest percent is; 23%
<h3>How to find the percentage Profit?</h3>
This percentage profit decrease can be found from the formula:
% profit decrease = (This year's profit - Last year profit)/Last year profit * 100%
Plugging in the relevant values gives;
%Profit decrease = (1,650,000 - 2,150,000)/2,150,000 * 100%
%Profit decrease = -500,000/2,150,000 * 100%
%Profit decrease = 23%
Read more about Percentage Profit at; brainly.com/question/19104371
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