Current location - Training Enrollment Network - Mathematics courses - The answer on page 17 of the math classroom workbook in the second volume of the sixth grade is urgent ~~~30 points. . Ok, let me add one more thing.
The answer on page 17 of the math classroom workbook in the second volume of the sixth grade is urgent ~~~30 points. . Ok, let me add one more thing.
Dear, let me help you ~~ First question: Everything is in direct proportion. Reason: 1. Salt water ratio =9.

2 The square of the area on the radius =3. 14

Question 2: Draw a picture yourself, and you will find it is a straight line. The reason why the ratio is proportional is that the shadow length ratio is higher than 0.6.

Tree height: the shadow length ratio of 2.4m is 0.6 = 4m.

Shadow length: 9 meters high multiplied by 0.6=5.4 meters.

I think it's quite detailed ~ ~ ~ Ask me if there is anything wrong ~ ~ ~