13 m ...?.........;;;;;;;;;
16 ounces in a pound
16*3=48
48 ounces of mixed nuts
a. Recall the double angle identities:


Then

Applying the identity again, we have

as required.
b. Using the result from part (a),



(where
is any integer)

173452. I think that is it.

where x is the estimated value and xr the real value

the percent error is 10.71%