Final answer:
At age 3, Angie is likely to weigh around 40 pounds, considering the average growth rate where a child's weight quadruples by age 2.
Step-by-step explanation:
If a toddler, Angie, weighs 20 pounds at age 1, you can expect her weight by age 3 to be in line with typical growth patterns for children her age. Considering that an infant's weight usually triples by their first birthday and quadruples by the second year, it's likely that Angie's weight will be around double her weight at age 1 by the time she reaches age 3. According to growth charts and typical development patterns, Angie could reasonably be expected to weigh around 40 pounds by age 3.