Which of the following is a common source of groundwater pollution? a. oil slicks b. erosion along riverbanks c. spraying crop fields with pesticides d. throwing used beverage containers into a lake

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.)

Scientists follow specific processes in order to determine valid explanations and conclusions from observations. david observed strange lights in the sky above his home outside of roswell, new mexico. the only explanation that makes sense to him is that there are ufos in the area. what should david do next to verify his explanation?

If the area of a square has increased by a factor of 16, by how much has each side increased?