Aresearcher gives a vitamin to half of the subjects in an experiment and a placebo (a pill with no active ingredient made to look like a vitamin) to the other half. the researcher is incorporating what aspect of successful experimental design in his study?
a. blocking
b. self-selection
c. bias
d. control

Tom is making a punch that contains 80% cranberry juice and the rest ginger ale. the punch has 2 liters of ginger ale. part a: write an equation using one variable that can be used to find the total number of liters of cranberry juice and ginger ale in the punch. define the variable used in the equation and solve the equation. hint: 0.8x represents the number of liters of cranberry juice in the punch. (5 points) part b: how many liters of cranberry juice are present in the punch? show your work.

The fraction 7/9 is equivalent to a percent that is greater than 100%. truefalse

Can someone answer this question for me