Emily is conducting an experiment to see what battery lasts the longest in her flashlight. She tries 4 different brands of batteries, including a generic brand. She puts each into her flashlight, turns on the flashlight and starts a timer to see how long before the light goes out. In this experiment, what is Emily's independent variable?Group of answer choices

Gregory draws a scale drawing of his room. the scale that he uses is 1 cm : 4 ft. on his drawing, the room is 3 centimeters long. which equation can be used to find the actual length of gregory's room?

Marco has $38.43 dollars in his checking account. his checking account is linked to his amazon music account so he can buy music. the songs he purchases cost $1.29. part 1: write an expression to describe the amount of money in his checking account in relationship to the number of songs he purchases. part 2: describe what the variable represents in this situation.

Formulate alisha has a number in mind. if she adds three to her number the result is less than five. use this information to write and solve an inequality about alisha's number. then graph the solution set.