Question

can someone show me how to do each steps on problem I attached?

Answer 1

910... +-18

Answer 2

A = pi r^2

r = sqrt(A/pi)

r = sqrt((910 +- 18)/pi)

Answer 3

does sqrt mean square root? Also on the numerator are you adding 910 plus negative 18 all under pi?

Answer 4

yes sqrt means square root

Answer 5

plus or minus

Answer 6

oops! I mean't adding 910 to negative 18 which will all be over pi?

Answer 7

over: (910 + 18)/pi
exact: (910)/pi
under: (910 - 18)/pi

Answer 8

if i did it right, i get a variance of .1675..

Answer 9

so you have to add first and then subtract?

Answer 10

you are given an error that can be +18 or -18 either way

Answer 11

so you have to determine the exact radius for the exact area; then determine the radiuses for the over and under allowances

Answer 12

the difference in radiuses is then the margin of control

Answer 13

so you solve for exact radius then over and under? How did you get .1675

Answer 14

by taking the difference in the radiuses;

Answer 15

you might have to double it to fit the question tho since that is the variance from exact either way