What was life and trade like in the Sahara Desert prior to the early 1200s?

The recommended daily calcium intake for a 20-year-old is 1,000 milligrams (mg). one cup of milk contains 299 mg of calcium and one cup of juice contains 261 mg of calcium. which of the following inequalities represents the possible number of cups of milk m and cups of juice j a 20-year-old could drink in a day to meet or exceed the recommended daily calcium intake from these drinks alone?

Mount saint helen the great lakes and death valley are physical features of the earth which scientific term describes these features

Ricks boss often appriciates him for his work.how is rocks boss affecting his proformence