Plz you don"t have to do all but some
1. wanda witch has a small halloween party. 7 out of 10 witches she invited came. katrina witch had a larger party. 71 out of 100 witches she invited came. compare the two using decimals.

2. a collection of black cats and crows has a total of 99 heads and legs between them. there are twice as many crows as there are cats. how many of each are there?

3. darla witch flew 75,168 miles in 9 years. sonia witch flew 62,314 in 7 years. who flew the most miles per year? what was the difference?

4. if christmas day (december 25) is on a friday, on what day of the week will halloween (october 31) be on?

Which scenarios are most effectively explored by conducting an experiment? there is more than one correct answer. select all that apply. researchers want to study the effectiveness of a particular drug for treating migraines. they want to know which dosage of the drug yields the best results with the least side effects. to ensure fair results, the researchers want to ensure that participants and dosage administrators do not know which dosage participants receive. a teacher wants to plan a class fieldtrip and quickly determine where students prefer to go for the class fieldtrip. a car mechanic wants to know which of two engine brands makes better-performing engines. he wants to test the engines in identical situations and rate their performance in a way that can be fairly measured. a chemist studies the properties of a metal compound. she wants to know how the sample size of the metal affects its ability to conduct electricity. she wants to conduct the research in a controlled environment to minimize bias. a realty company wants to know the average income of its clients. the company wants to gather data income from current clients.