Solve for y, z, x or t: t+at/b=1 if a≠-b

When turned about its axis of rotation, which shape could have created this three-dimensional object?

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?

Divide reduce the answer to lowest term 3/7 divided 1 1/6