Scientists found stone tool specimens in a cave in africa. using potassium–argon radiometric dating, they discovered that the tools contained 25 percent radioactive potassium-40. how old are the tools? (you must show your calculations to receive credit.) *the half-life for potassium-40 to argon-40 is 1.25 billion years.

1. loamy sand is about 80% sand with 10% clay and defined mostly by sand particles with some clay to provide structure and fertility. the sand particles are easily visible and the soil holds structure but breaks apart easily.

2. scott sand can improve his soil quality by incorporating more silt and organic matter into the soil. peat moss and organic matter can also be incorporated.

b exhibiting favoritism toward the kikuyu people.