Which of these is an example of a non-random sample?
a.
a cereal company surveys their employees about breakfast food preference.

b.
a farmer is choosing grains of wheat from a field to test for a new flavor of cereal.

c.
ten college students at a college, population 50,000, are chosen to taste test a new cereal.

d.
a cereal company puts a winning ticket in one box of cereal out of 100,000 boxes.

Tanya has $42 to spend at the dolphin island store. tshirts sell for $7 each and a pair of sunglases sells for $6.tanya buys 3 tshirts. how many pairs of sunglases can she buys with the amount of money she has left

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?

The swimming pool is open when the high temperature is higher than 20∘c. lainey tried to swim on monday and thursday (which was 33 days later). the pool was open on monday, but it was closed on thursday. the high temperature was 30 ∘c on monday, but decreased at a constant rate in the next 33 days. write an inequality to determine the rate of temperature decrease in degrees celsius per day, d, from monday to thursday.