What is the common base for 2exp3 x 2 exp 8 ?

Steve is scuba diving near his home in maui. at one point he is 100 feet below the surface. represent this number with a negative number. if he descends another 5 feet, what negative number will represents his.

The distance of a chord from the centre of a circle is 12cm and the lenght of the chord is 10cm. find the radius of the circle

Alex's monthly take home pay is $2,500. what is the maximum bad debt payment he can maintain without being in credit overload?