The first two are correct because you have to understand and the questions are right good job w8th it
To compare ratios, write them as fractions. The ratios are equal if they are equal when written as fractions.
Multiply 36 by 75 because they need to find how many yards they need
It would be 5.4 knowing that 9.6 is not the diameter you would need a larger radius so that when it is doubled you get a good number :)
