A group of 30 randomly selected students have a mean score of 24.6 with a standard deviation of 3.3 on a placement test. What is the 95% confidence interval for the mean score, μ, of all students taking the test?

Adepartment store purchases screen-printed t-shirts at a cost of $5 per shirt. they mark up the price 150% (making the selling price 250% of the store's purchase price) and put them on the sales floor. every month that a t-shirt doesn't sell, the store reduces the selling price by 25%.

Select 2 statements that are true about the equation y+6=-10(x-3).1) the slope of the line is -102) the slope of the line is 33) one point on the line is (3,6)4) one point on the line is (3,-6)

Pls never taught i’m really confused and i rlly need