Solve the equation. type the correct solution into the box z+4/21=1/z

Click on the y intercept. -x +4 i know you cant click on it so could you just say the coordinates like (example - (1,0) you so much.

Afarm that has 4 x 10^2 acres has 1.2 x 10^5 cattle. what is the average number of cattle per acre? write the answer in scientific notation. answere asap

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?