The ratio of bikes to helmets is 7: 6 if there are 28 bikes how many helmets are there

How much orange juice do you need to make 2 servings of lemony orange slush?

Zahra runs a 500-meter race at a constant speed. which graph shows her distance from the finish line during the race?

Aresearch study is done to find the average age of all u. s. factory workers. the researchers asked every factory worker in ohio what their birth year is. this research is an example of a census survey convenience sample simple random sample