Help please! Multiple choice questions: An advertiser wants to measure audience response to a new movie. He randomly selects 10 showings of the film and surveys every attendee to these showings. This is an example of:

A) Cluster sampling

B) Simple random sampling

C) Snowball sampling

A researcher wants to determine whether caffeine impacts memory. She breaks her subjects up into four groups: no caffeine, half a cup, a full cup, and two cups. She then has them complete a memorization task. What is the dependent variable?

A) The location of her
experiment

B) Amount of caffeine

C) The number of subjects

answer for #1 is c

answer for #2 is d

can i get brainliest

- "runner b is moving at a slower rate."

- "the graphs shown are graphs of distance(km) against time(min).

the slopes of this graphs are are given by:

slope = (change in y)/(change in x)

= (change in distance)/(change in time)

this is the formula for finding the speed. so, the slope of these graphs represent the speed of the runner.

taking each division in the graph to represent 1 on both axis:

runner a ⇒ speed = (2-0)/(1-0)

= 2/1

= 2 km/min

runner b ⇒ speed = (3-0)/(3-0)

= 3/3

= 1 km/min

this shows that   runner b is moving at a slower rate."

3

step-by-step explanation:

divide 13.5 by 9 to get the scale factor. it equals 1.5

2 * 1.5 = 3

d

step-by-step explanation:

the 2000 florida legislature amended section 322.05, florida statutes, changing the requirements to obtain a class e license for a driver under the age of 18 holding a learner's license. the following requirements must be met in order to obtain a regular class e license if a learner's license is issued on or after october 1, 2000:

must hold a learner's license for at least 12 months or until the 18th birthday.

must have no convictions 12 months from the issue date of the learner's license.

may have one traffic conviction within 12 months from the issue date of the learner's license if adjudication is withheld.

a parent, legal guardian, or responsible adult over 21 years old must certify that the driver has 50 hours driving experience, including 10 hours of night time driving.