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MATH / This graph shows the number of days in October that Carla studied for particular…

Problem

Answer published by the source. Consult the official source to check your work against its answer.

problem

This graph shows the number of days in October that Carla studied for particular periods of time. For example, on five different days in October she studied for exactly one hour. On how many days in October did Carla study three or more hours?

[asy]size(150,150);
draw((0,10)--(0,0)--(19,0));
for(int i = 1; i<=10; ++i)
{if(i!=5 &&i!= 10)
{draw((-.5,i)--(.5,i)); draw((.5,i)--(19,i),linetype("1 4"));}
else if(i==5)
{draw((-.5,i)--(.5,i),W,linewidth(1.5));draw((.5,i)--(19,i),linetype("1 4"));}
else
{draw((-.5,i)--(.5,i),W,linewidth(1.5)); draw((.5,i)--(19,i),linetype("1 4"));}
}
label("5",(-.5,5),W,fontsize(8pt)); label("10",(-.5,10),W,fontsize(8pt));
for(int i = 0;i<=5;++i)
{label(string(i),(3i+2,-.5),S,fontsize(8pt));
}
void drawrect(int rectnumber, int height)
{filldraw((3*rectnumber-2,0)--(3*rectnumber-2,height)--(3*rectnumber,height)--(3*rectnumber,0)--cycle,white);}
drawrect(1,2); drawrect(2,5); drawrect(3,8); drawrect(4,10); drawrect(5,3); drawrect(6,3);
label(rotate(90)*"\# of days (in Oct.)",(-2.5,5),W,fontsize(8pt)); label("hours studied per day",(19/2,-2.5),S,fontsize(8pt));[/asy]

level

Level 2

type

Prealgebra

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Source and history

task_id
dd5e464f-979b-51c2-a035-ee2f407bfd93
task_key
prealgebra--test--dd5e464f-979b-51c2-a035-ee2f407bfd93
task_revision_id
1
config / split
prealgebra / test

Official source

initial import