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?

Asailor is looking at a kite. if he is looking at the kite at an angle of elevation of 36and the distance from the boat to the point where the kite is directly overhead is 40 feet, how high is the kite?

Simplify this expression.2(10) + 2(x – 4) a. 2x + 16 b. x + 12 c. 2x + 12 d. x + 16

Inez has a phone card. the graph shows the number of minutes that remain on her phone card a certain number of days.