A surveyor standing next to a hut on one side of a river sights a boulder on the other side and determines the angle from the hut to the boulder is 70o. She then walks 100 meters parallel to the river until she arrives at a tree. The angle to the boulder from the tree is 32o. How far from the hut is the boulder?

answer is  

a.

7 in. x 11 in.

hope you get this right.

b) yes

step-by-step explanation:

let the statements be named as,

statement 1: if the power has been cut, then the refrigerator does not work.

statement 2: the refrigerator does not work.

conclusion: the power has been cut

now, 'law of detachment states that if we have the statements given as,

1. if p, then q.

2. p

then, we get the true statement or conclusion as q'.

thus, on comparing, we get that,

p: if the power has been cut.

q: the refrigerator does not work.

so, the argument is true by the law of detachment.