Respuesta :

Answer:

$84.95

Step-by-step explanation:

Convert 3.9 kilograms to grams.

3900 grams.

Divide 3900 by 780.

The answer is 5.

Multiply 5 by $16.99

5 · 16.99 = $84.95

Rhonda spent $84.95 on coffee.

Hope I helped :)

Please consider Brainliest :)