In the human arm, the forearm and hand pivot about the elbow joint. consider a simplified model in which the biceps muscle is attached to the forearm 3.80 cm from the elbow joint. assume that the person's hand and forearm together weigh 15.0 n and that their center of gravity is 15.0 cm from the elbow (not quite halfway to the hand). the forearm is held horizontally at a right angle to the upper arm, with the biceps muscle exerting its force perpendicular to the forearm.

In This Question there are three parts so answers of the three parts are in the following attachments .

Step-by-step explanation:

y = 0.77(x)

step-by-step explanation:

the jacket retains this value after 23% cut or retains 77% of original value. plug original 87 jacket price for x and the remaining value should be y.

i think it is everything has to equal 180 so, if i correct 4=c. 6=d. 8=a. 7=b. and the last question would be c. because they are parallel lines and they are congruent.

step-by-step explanation:

the reason everything has to equal to 180 is because that is how it works. i'm guessing that is its rule. 4 and 8 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 6 and 7 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 60+60 is 180. so, now you have your answer