You are the veterinarian at a zoo that has 21 zebras. Each zebra needs to get four intravenous shots (over the course of a month) of a vaccination against Zebra Zombie Disease. Each injection contains 750 mg of the active vaccination agent. How many grams of the active vaccination agent should you order for the month?

Iwill give brainliest if you answer right : )

In a simplified model of the human eye, the aqueous and vitreous humors and the lens all have a refractive index of 1.40, and all the refraction occurs at the cornea, whose vertex is 2.60 cm from the retina. what should be the radius of curvature of the cornea such that the image of an object 40.0 cm from the cornea’s vertex is focused on the retina?

The freezing and boiling point of a substance changes as the air pressure around it changes. for example, at a lower air pressure (higher altitude) it is easier for water molecules to escape from liquid into the air. in a high altitude city such as denver, colorado compared to a sea-level city such as houston, texas, water