In three to four sentences, explain why prices decrease when a market moves from a monopoly to perfect competition.

Dr. redbull conducts a study to determine whether her new energy drink children perform better on spelling tests. she randomly assigns children to one of two groups: group 1 receives her energy drink and group 2 receives water. she then gives both groups a spelling test and compares the results. which of the following is true about this study? a. group 1 is the dependent variable and group 2 is the independent variable. b. this is a correlational study. c. group 2 is the experimental group. d. the independent variable is the type of drink the children receive.

In the 1800s, dorothea dix worked to improve conditions ina.)prisons and hospitals. b.)mills and factories. c.)utopian communities. d.)public schools

Cual es la funcion de la vacuna para que `puedan prevenir futuras infecciones de la misma enfermedad