If 14 g of a radioactive substance are present initially and 3 years later only 7 g remain, how much of the substance will be present after 8 yr?

You have 6 dollars +12 pennies +to quarters + 4 dimes=2 nickels how much do you have

One astronomical unit (1 au) is about 1.496 alt tag missing. kilometers. if you wrote this number of kilometers in regular decimal notation (for example, 528 and 3,459 are written in regular decimal notation), how many zeros would your number have?

Ineed to know the ordered pairs for this equation i need the answer quick because it’s a timed test