Step-by-step explanation:
5 because you have to round
Answer:
18, 21
Step-by-step explanation:
There is a difference of 3 between any two consecutive term ( succeeding - preceding)
Hence 15 + 3 = 18
& 18 + 3 = 21 are the required terms.
I think that Harry should use 1.5-2 cups of flour for his cake. It depends on the size of the cake so if its pretty small, 1.5 cups should work. If you want to take a risk, use more cups of flour.