If the half-life of a unstable isotope is 10,00 years and only 1/8 of the radioactive parent remains how old is the sample? a.10,000 b. 20,000 c. 30,000 d. 40,000

The hawaiian alphabet has 12 letters. how many permutations are posible for each number of letters?

Which set of side lengths form a right side? a) 3ft,6ft,5ft b)50 in,48in,14in c)53m,48m,24m d)8cm,17cm,14cm

Acompound inequality is graphed, and its graph consists of all real numbers. which open scentence could have resulted in this solution set r> 3 or r< -2. r< 3 or r< -2. r> 3 or r> -2. r< 3 or r> -2 plz asap