Kirk bought 2 1 4 pounds of lemons. He used 1 4 of the lemons to make lemonade. Kirk completed this work and found that he used 9 pounds of lemons. Did he do the work correctly? Explain. 2 1 4 ÷ 1 4 = 9 4 ÷ 1 4 = 9 4 ÷ 4 1 = 9 Is Kirk’s work correct? Why or why not? Yes. Kirk’s work is correct. No. Kirk should have multiplied by the reciprocal. No. Kirk should have divided One-fourth 2 and two-fourths. No. Kirk should have multiplied instead of dividing.

Which equation matches the graph shown ?

Apsychology student wishes to investigate differences in political opinions between business majors and political science majors at her college. she randomly selects 100 students from the 260 business majors and 100 students from the 180 political science majors. does this sampling plan result in a simple random sample? why or why not? no, because each group of 200 students in the sample does not have the same chance of being selected. yes, because each group of 200 students in the sample has the same chance of being selected. no, because each individual student does not have an equal chance of being selected. yes, because each individual student has the same chance of being selected.

Abacteria population is tripling every hour. by what factor does the population change in 1/2 hour? select all that apply