Using the washer method, the volume is given by
or by the shell method,
Circumference of circle= 2*idonthaveapisymbol*r
2pir
Or
Pi x diameter = 3.14 * 20
2(3.14)(10)
In a rectangular prism, surface area is calculated by multiply all the faces of the prism that you can touch
Becuase there's four faces that have the measurement of 5*3, you do 4(5*3) and because there's only two faces that have the measurement of 3*3, you do 2(3*3)
Which becomes 4(5*3)+2(3*3) which is 78
The correct answer should be 4. 2 times 0.3 is 0.6. 3.4 plus 0.6 equals 4. ;)
