Lamont designs a survey of town residents in an attempt to predict who will be elected mayor. He chooses his sample of 500 people from the town’s 40,000 residents by asking his question to every person leaving the public library on a Saturday. Which suggestion would most improve Lamont’s random sample?
Lamont should sample only adults.
Lamont should sample only registered voters.
Lamont should decrease the sample size.
Lamont should ask every fifth person.

Lamont should sample only registered voters.

Step-by-step explanation:

Since he is trying to predict who will be elected mayor, if he samples someone that is not a registered voter, their opinion will not ultimately affect the outcome, since they cannot vote.

This means he should only sample those people that are registered voters.

60

step-by-step explanation:

every triangle measures a total of 120 degrees. you have to find angle c. we know that isosceles triangles angles are equal. 60 degrees plus 60 degrees gives you 120.