Answer:
4
Step-by-step explanation:
it took a while but here's my math

I think the permeate would be 8cm, correct me I’m I’m wrong. Sorry if I got the answer incorrect
Special cases of the sum and difference formulas for sine and cosine yields what is known as the double‐angle identities and the half‐angle identities.
In June he read 0 to 45 pages per day
In April he reads 10 to 90 pages per day