Sally likes to walk with a group of friends on a regular basis. they tend to walk 30 minutes a day, three days a week. she also partakes in jazzercise for an hour every saturday. is sally meeting the acsm and aha's minimum recommendations for physical activity?

Yes, Sally is meeting the AHA and ACSM minimum recommendations for physical activity.  

AHA, that is, American Heart Association refers to a non-profit organization in the United States, which encourages suitable cardiac care in an attempt to minimize disability and deaths resulting due to stroke and cardiovascular disorder.  

The ACSM, that is, American College of Sports Medicine refers to a huge exercise science and sports medicine membership organization. It integrates and promotes scientific research, practical application of sports, medicine, education, and exercise science to enhance and maintain physical performance, health, fitness, and quality of life.  

they have identical fossils of organisms that have evolved over time.

both have animal fossils preserved in them due to weathering and erosion.

they contain different fossils because life on earth has changed through time.

the fossils in them were formed on the surface of earth due to exposure to sunlight.