Find the surface of a cone radius 8 height 15

Find the missing factor in exponential form 48^2=3^2 • ?

Which of the fallowing best completes the sequence 5,10,15, a) 30 b) 22 c)25 d)35

Long division setup showing an incomplete calculation. 12 is in the divisor, 6839 is in the dividend, and 5 hundreds and 6 tens is written in the quotient. 6000 is subtracted from 6839 to give 839. an unknown value represented by a box is being subtracted from 839. what number should be placed in the box to complete the division calculation?