3. Back in high school, Mr. D ran track. One event he ran was the 400 m dash. His best time was 50 seconds.
What was his average speed during that race?

Three cylinders have a volume of 2836 cm^3. cylinder a has a height of 900 cm. cylinder b has a height of 225 cm. cylinder c has a height of 100 cm. find the radius of each cylinder. use 3.14 as an approximate for π

How do businesses a country's economy? a. by investing in goods and services b. by increasing the unemployment rate c. by making profits

Researchers were interested in whether relaxation training decreases the number of headaches a person experiences. they randomly assigned 20 participants to a control group or a relaxation training group and noted the change in number of headaches each group reported from the week before training to the week after training. which statistical analysis should be performed to answer the researchers' question?