# sum in physics

## Homework Statement:

Find the desired sum: (3±4%)+(4±0.01)

## Relevant Equations:

none

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etotheipi
Gold Member
2019 Award
Well, why not just use the formula for propagation of uncertainties, if ##z = a + b##, then$$\Delta z = \sqrt{(\Delta a)^2 + (\Delta b)^2}$$N.B. you need to convert the percentage uncertainty in the first measurement into an absolute uncertainty first.

berkeman
Mentor
OP has been banned for repeatedly posting homework with zero effort shown, even after multiple warnings. Have a nice day. Thread is locked.

archaic, etotheipi and SammyS