Auranium-235 sample starts with 200 atoms, and 700 million years later, there are 100 atoms. what is the half-life of uranium-235?
a. 350 million years
b. 235 years
c. 100 years
d. 700 million years

Find the equation for the plane through upper p 0 left parenthesis negative 4 comma negative 8 comma negative 5 right parenthesis perpendicular to the following line. xequalsnegative 4 minus t, yequalsnegative 8 plus 2 t, zequals3 t, minusinfinityless thantless thaninfinity

Which bonds are found inside a water molecule

Which body part transports oxygen removes waste materials in carries nutrients to the body as part of the circulatory system