Joan was placed in charge of planning her sorority spring formal dance. If she thought she should hire the same band that played at last year’s dance because of how much everyone enjoyed the band, Joan could be considered to be encountering the barrier to effective problem-solving.

Unnecessary constraints

Explanation:

Unnecessary constraints is when people place a mental block to solving problem. They assume irrelevant information is causing distraction for a solving the problem at hand. Such is what Joan is facing.

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

hello,

answer: a federal government has final authority on interstate/inter provincial  and international affairs, a confederation is one where the central/national government or authority is governing body what does not have final say over the same matters. hopefully this and i will try again if you don't like this answer : )

best of luck!