Question 1144667
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<pre>
To learn what "per hill" means, as well as what "growing plants on a hill" means,

consult these links



    https://homeguides.sfgate.com/spacing-hills-mean-90658.html


    https://homeguides.sfgate.com/many-cucumber-seeds-plant-hill-52712.html     


    (demonstrate your elementary curiosity . . . ).



The area for one hill is  3.5 ft x 3.5 ft = 12.25 square feet per hill.


The number of hills in 1 acre area is  then  {{{43560/12.25}}} = 3556 (approximately).


With 3 plants per hill, the number of plants is  3556*3 = 10668.    <U>ANSWER</U>
</pre>


4-th grade problem of a primary school, &nbsp;I assume.




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<U>comment from student</U> : &nbsp;The information is in an agricultural guide. Answer is same as yours. 

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Wasn't sure how they arrived at answer.
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<U>My response</U> :  &nbsp;&nbsp;Thank you for your info.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;It is good comment to the solution by @greenestamps.