15. Food chain always start with a. Photosynthesis
Decay
b. Respiration
d. N2 Fixation
C. Photosynthesis

Use the empirical rule. the mean speed of a sample of vehicles along a stretch of highway is 70 miles per hour, with a standard deviation of 4 miles per hour. estimate the percent of vehicles whose speeds are between 66 miles per hour and 74 miles per hour. (assume the data set has a bell-shaped distribution.)

Which best describes the difference between internal and thermal energy?

Where should a carbon monoxide detector be mounted?