a survey is run to find average salary of employees working in restaurants in abc town. a random sample of 100 employees shows that their average salary is rp 100.000,- with standard deviation of rp 20.000,-. using 98% confidence level, state the standard error of the survey.

28°

Step-by-step explanation:

In the given picture , we are given that ∠NOP = 104°.

Also, in triangle MNO ,

segment MN ≅ segment NO

⇒ ∠NMO ≅ ∠NOM       [Angles opposite to equal sides of a triangle are equal]                                                                                                 (i)

Also, ∠NOM+∠NOP=180°

⇒ ∠NOM=180°-∠NOP = 180°- 104° = 76°

From (i) , ∠NMO = ∠NOM = 76°

Now, in  ΔMNO, we have

⇒∠MNO+∠NMO + ∠NOM=180°     [Angle sum property]

⇒∠MNO +76°+76°=180°

⇒∠MNO +152°=180°

⇒∠MNO =180°-152°=28°

Hence, the measure of ∠MNO = 28°