If an= (an-1) +5 and a1=4 what is the value of a5?

Farnesene is a sesquiterpene. how many different isomers arising from double-bond isomerizations are possible? g

Some boys and girls were asked if they had a pet. one third of the group were boys. there were 20 boys. 20% of the girls had a pet. boys with a pet : girls with a pet = 1 : 5 i need to know how many girls there are.

Simplify (2^5/3^2)^4 a. 2^20/3^8 b. 2^9/3^8 c. 8^5/12^2 d. 2/3^2