Pick which schedule of reinforcement fits the statement (Fixed ratio, fixed intervals, variable ratio, variable interval)
1. A worker is paid $1.50 for every 100 envelopes stuffed.

2. Waiting in line at the bank to make a transaction.

3. Checking the oven to see if a cake is done after exactly 30 minutes of bake
time.

How many questions do they give on the sat

The different forms of a gene for a given trait are called .

Scientists observed a rock stratum and discovered some fossils. the image shows the fossils they discovered. what can you interpret from the image? an illustration showing layers rock with fossils embedded in some rock layers1. the dinosaur and the mammoth existed after the trilobites.2. the dinosaur and the armored fish existed before the trilobites.3. the trilobites and the armored fish died before the dinosaur.4. the trilobites and the armored fish were born after the dinosaur.5. the early mammoth is older than the trilobites.