Here, it takes 3 minutes 30 seconds for a squirrel to gather 21 acorns.
Since 1 minute = 60 seconds
3 minutes 30 seconds = 3½ minutes = 3.5 minutes
To find how many acorns the squirrel will gather after 10 minutes, we have:
3.5 minutes = 21 acorns
10 minutes = x acorns
Cross multiply:
[tex]\begin{gathered} 3.5x\text{ = 21 }\ast\text{ 10} \\ \\ x\text{ = }\frac{21\ast10}{3.5} \\ \\ x\text{ = }\frac{210}{3.5} \\ \\ x\text{ = }60\text{ acorns} \end{gathered}[/tex]Therefore, after 10 minutes the squirrel will gather 60 acorns
ANSWER:
60