[img]2015m7x/ct_egreqj_egreqtbz1_0110_20151[/img]From 1930 to 1990, approximate

游客2025-02-23 34

问题

From 1930 to 1990, approximately what was the average increase per year in per capita income?

选项 A、$150
B、$200
C、$250
D、$300
E、$350

答案 D

解析 For the 60-year period from 1930 to 1990, the per capita income increased by $24,230 - $6,610, or $17,620. The average annual increase is

, which is approximately

, or $300.(Since the choices are quite far apart, there is no need for an accurate calculation.)The correct answer is Choice D.
This explanation uses the following strategies.
Strategy 4: Translate from a Figure to an Arithmetic or Algebraic Representation
Strategy 9: Estimate

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[img]2015m7x/ct_egreqj_egreqtbz1_0110_20151[/img]From 1930 to 1990, approximate

[img]2015m7x/ct_egreqj_egreqtbz1_0106_20151[/img]Whichofthefollowingisclos

Whichofthefollowingstatementsaretrue?[img]2015m7x/ct_egreqj_egreqjs_0124

ByapproximatelywhatpercentdidthemedianpriceofhomessoldinCountyTdec

[img]2022m10s/ct_ve01203002j_egreqjs_0180_202211[/img]Inthesumabove,ifXan

在下面的图中，ABCD是长方形，AB=5，AF=7，FD=3。[img]2022m10s/ct_ve01203002j_egreqjs_0100_202211

[img]2022m10s/ct_ve01203002j_egreqjs_0195_221011[/img]Thefigureaboveshowsfi

在下面的图中，圆A半径为2，圆B半径为3。[img]2022m10s/ct_ve01203002j_egreqjs_0101_221011[/img]Qua

Whatisthenearestvalueof[img]2022m10s/ct_ve01203002j_egreqjs_0175_202211[/i

在下面的图中，四边形ABCD外切于圆。AB=a，CD=b。问四边形ABCD的周长是多少?[img]2022m10s/ct_ve01203002j_egreqj

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[originaltext]MymotherwasborninasmalltowninnorthernItaly.Shewas

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