The temperature in Wintergreen Resort in Virginia fell from 15.8 degrees Celsius to -2.7 degrees Celsius. What is the difference between the two temperatures?
13.1 degrees
18.5 degrees
-18.5 degrees
- 13.1 degrees

What effect would doubling all the dimensions of a triangular pyramid have on the volume of the pyramid? explain your reasoning.

What are the values of each variable in the diagram below?

Scores on the cognitive scale of the bayley-scales of infant and toddler development range from 1 to 19, with a standard deviation of 3. calculate the margin of error in estimating the true mean cognitive scale score, with 99% confidence, if there are 12 infants and toddlers in a sample.