News cameras take an overhead picture of a part of a crowd at an outdoor event Journalists then count the number of people
in the picture and use the sample to estimate the total number of people in the crowd. This process is an example of
random sampling
stratified sampling
systematic random sampling
cluster sampling

ab: 2 n83b8eb7ebi. 8e yen in

you'll just earn points here

step-by-step explanation:

answer: entity is prob the answer

step-by-step explanation:

answer: cos [   arcsin (3/5) - arccos (1/2) ] =

step-by-step explanation: × = 3/5 = 0.6--> x = 36.87 and x = 180 - 36.87 = 143.13 deg

cos y = 1/2 --> y = +- 60 deg a. cos (x - y) = cos (143.13 - 60) = cos 83,13  

=

0.12

b. cos (36.87 - 60) = cos (-23.23) = 0.92