you find a rock containing a mixture of element and lead. you determine that 20% of the orignial element remain; the other 80% decayed into leads. how old is the rock?

What processes are needed to solve for functions and their inverses?

Lake Superior covers an area of about 31700 square miles write this number in scientific notation

What is the lcm of 18 and 30 using prime factorization?

What is the perimeter of the figure to the nearest tenth of a millimeter? A. 9.4 millimeters B. 12.0 millimeters C. 21.4 millimeters D. 30.8 millimeters

What is 63 and 84 gcf

Numbers that are divisible by 2,4,6,8,10 have to be.

How many 1/4 hours are in 1 hour?

Which statement is true about the potential solutions for this equation? Both are extraneous solutions, Only x=-1 is an extraneous solution. Only x = 3/2 is an extraneous solution. Neither solution is extraneous.

What is the acceleration of 10 kg mass at 25 m/s2

Three years ago Jolene by $750 worth of stock in software company since then the value of her purchase has been increasing at an average of 12 3/5 percentage per year how much is the stock worth now