Pls answer this is a timed test

Ren should use a cleaning product that contains a base. This is because bases readily react with lipids, the kind of compound that makes up grease. A base would break down the grease, forming soap, which would then easily wash away.

Explanation:

ed2020

muscle endurance

explanation:

i can do 50 in a row ( but i get so tired after that)

explanation:

v=uf/(u-f)

= 5.-10/(5+10) convex lens has negative focal length