The correct answer is d hope i could help
During the Progressive era, economic production shifted from capital goods to consumer goods.
<h3>What was the progressive era?</h3>
This was the era in the United States that was marked by very wide spread social activism and political activism in the nation.
The goal was to stop certain industrial practices in the nation. They moved from capital to consumer goods in the period.
Read more on progressive era here; brainly.com/question/8179112
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<h3>Answer:</h3>
AC ∈ {4, 5, 6, 7}
<h3>Explanation:</h3>
When two sides of a triangle are specified, the allowable values for the length of the third side are between the sum and difference of the given sides.
In ∆ACD, sides DA and CD are both given as length 4. Thus the possible range of values for side AC is 0 – 8. The extremes of this range result in ∆ACD having zero area, so we assume they are not of interest.
In ∆ACB, sides AB and BC are given as having lengths 3 and 6. Thus the possible range of values for side AC is 3 – 9. The extremes of this range result in ∆ACB having zero area, so we assume they are not of interest.
The integers that are in both ranges and that give triangles with non-zero area are ...
... AC ∈ {4, 5, 6, 7}
