Although her parents insisted that she could not go to the movie with her girlfriends on a school night, Barb continued to try to persuade them to change their minds. "What if I promise to do my homework when I get home? I could do my homework in study hall tomorrow. What if I did my homework at the movie?" Her ability to generate experimental attacks to a problem indicates that she is in Piaget's:.a. pre-operational stage of cognitive development. b. concrete operational stage of cognitive development. c. formal operational stage of cognitive development. d. the egocentric stage of cognitive development.

C- Formal operational stage of cognitive development

Explanation:

Formal Operational Stage of Cognitive Development can be seen as the way a person find solution to a problem by manipulating ideas in their mind which help them to find answer to the problem thereby using it to solve such problem.

The formal operational stage is a stage which often begins at the age of twelve and lasts into adulthood.

At this stage, a person begin to have the ability to always think in an abstract way in other to know the way to tackle or attack a problem because the person is able to plan quickly which help them to find a way to solving a problem.

Therefore Her ability to generate experimental attacks to a problem indicates that she is in Piaget's FORMAL OPERATIONAL STAGE OF COGNITIVE DEVELOPMENT.

C

Explanation:

formal operational stage of cognitive development.

The formal operational stage begins at approximately age twelve and continues into adulthood. As adolescents enter this stage, they gain the ability to think in an abstract manner by manipulate ideas in their head, without any dependence on concrete manipulation. At this point in development, thinking becomes much more sophisticated and advanced. Kids can think about abstract and theoretical concepts and use logic to come up with creative solutions to problems. Skills such as logical thought, deductive reasoning, and systematic planning also emerge during this stage. In the case of Barb, the ability to generate experimental attacks to a problem indicates that she is in Piaget's formal operational stage of cognitive development.

local max is .5

step-by-step explanation:

the local maximum is for x values between 2 and 4

it looks like the x value is 2.5 and the y value is .5

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