(a) 1.23 Pounds
(b) $ 4.92
Step-by-step explanation

Step 1
(a) What is the weight of the bag of peaches in pounds?
to convert units, construct a fraction that is equal to 1, multiply the original measurement by that fraction, and simplify.
then
we need to know the equivalence

we have the given measure in grams, so we need to let the grams in the denominator of the fraction in order to eliminate the grams unit

as the fracion equals 1, we are not changing the original measure
so,multiply the original measurement by that fraction, and simplify.

therefore, the answer for (a) is
(a)1.23 Pounds
Step 2
The peaches sell for $3.99 per pound, how much does Antonia's bag of peaches cost before taxes?
to solve this , we need to multiply the amount of pounds by the unit price, so

let

Now, replace.

hence,
(b) $ 4.92
I hope this helps you