Hw a researcher in the field of sports biomechanics believes he has found the “ideal” running posture for sprinters. he selects a random sample of 12 high school track sprinters and records their best 200 m time (in seconds). then he trains these sprinters over several days to run using his proposed “ideal” posture. in the days after the training ends, these sprinters run several 200 m races, and the researcher records their best performance from this time period. the before-training and after-training times (in seconds) are given below. use the sign test to test the claim that the proposed ideal running posture is effective (i. e. the median of the “before – after” differences is positive). use a 0.05 level of significance.

last option

step-by-step explanation:

given that δdef is right and isoceles,

assuming that side df is the hypotenuse means that de an ef are the other 2 sides that intersect at 90° and are of equal length.

because they are of equal length, we can say that they are congruent

because they intersect at 90°, their slopes must be opposite reciprocals.

only the last option satisfies these conditions.

to find the unit price, we must figure out the cost of one item (in this case one dish towel).   to do this, we divide the total price ($7.92) by the number of items bought (for this problem it is 8, because there are eight dish towels in one pack).  

$7.92/8 = $0.99

therefore, the unit price, or the price of one dish towel, is $0.99.

hope this !

i’m here for points.