Assume that the marginal cost of producing cigarette X is $10, the marginal cost of producing cigarette Y is $8, and that the market for both cigarettes is perfectly competitive . Assume that each pack of cigarette X smoked does $5 worth of health damage to the smoker, and a total of $4 worth of health damage to the smoker's neighbors via second-hand smoke. Each pack of cigarette Y smoked does $6 worth of health damage to the smoker, and $5 health damage to the smoker's neighbors .

According to naeyc, are the youngest age group that may be out of the hearing range of supervising teachers for short periods of time. preschoolers infants kindergarteners toddlers

What is the main structural difference between enveloped and nonenveloped viruses? a) enveloped viruses have their genetic material enclosed by a layer made only of protein.b) nonenveloped viruses have only a phospholipid membrane, while enveloped viruses have two membranes, the other one being a protein capsid.c) enveloped viruses have a phospholipid membrane outside their capsid, whereas nonenveloped viruses do not have a phospholipid membrane.d) both types of viruses have a capsid and phospholipid membrane; but in the nonenveloped virus the genetic material is between these two membranes, while in the enveloped virus the genetic material is inside both membranes.

Mary is 14 year old her resting heart rate is 70 beats per minute. calculate 50% of mary's maximum heart rate to fine her target heart rate