By Sine Rule,
x/sin30° = 8/sin90°
x/0.5 = 8/1
So x = 4.
Since we are finding the unit rate of the cost per comic, we will need to divide $5 by 20 comics which you will get 0.25 cents and divide $7.50 by 30 comics which you will also get 0.25 cents.Therefore, the unit rate and constant of proportionality is 0.25 cents.
Yes it can, it has to be a fraction
85 is not a prime, it’s a composite number.