Ascience class has 2 girls and 6 boys in the seventh grade and 5 girls and 3 boys in the eighth grade. the teacher randomly selects a seventh grader and an eighth grader from the class for a compettion. what is the probability that the students she selects are both boys?

Scores on the cognitive scale of the bayley-scales of infant and toddler development range from 1 to 19, with a standard deviation of 3. calculate the margin of error in estimating the true mean cognitive scale score, with 99% confidence, if there are 12 infants and toddlers in a sample.

‼️‼️‼️‼️‼️the pressure exerted on the walls of a container by a gas enclosed within it is directly proportional to the temperature of the gas. if the pressure is 6 pounds per square inch when the temperature is 440 f, find the pressure exerted when the temperature of the gas is 380°f. (show work)

7x^2-9x+5=0 find the discriminant and number of real solutions