A potassium isotope has a half-life of 1.25 billion years. Given that scientist estimate earths age to be 4.6 billion years what is the most likely percentage of parent to daughter isotopes this element currently existing on earth?

Which process is involved in growing crops? irrigation transportation recreation condensation

Which of the following would be a body response when stepping outside without a coat on a snowy day? a. senaceous glands. secrete more senum b. more liquid is transported by the body to the skin fir insulation c. blood vessels in the skin narrow and contract d. blood vessels in the skin expand

What is the most appropriate method of gaining weight (muscle mass)