On Saturday, 8 children made a sandcastle in 5 hours. On Sunday, two more children joined the group. How long it will take the children to build a new sandcastle on Sunday?

Only 4 hours

Step-by-step explanation:

8 children made a sandcastle in 5 hours. 8:5 ratio

10 children made a sandcastle in ? 10:? ratio is it?

Remember, It's inversely proportional, which means, more people, less time to take it to make the sand castle. So we would do, 8*? = 10 that would be 1.25. 8*1.25=10. then, do 5/1.25, cause it's "inversely proportional. I'm not sure if this is right, but I think it is 4 hours.

-14

step-by-step explanation:

2x2 – 2(x+4)

=2x2-2（5+4）

=4-2×9

=4-18

=-14

answer: procent 54 wynosi 33,33%