Tiffany sells musical instruments and equipment at Let It Rock in the mall. She earns a commission of 5% on the first $6,000, 7.5% on the next $6,000, and 10% on sales over $12,000. Her total sales for the month are $14,640. What is Tiffany’s total commission?

Max recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a) the median of max’s data is 250 b) more than half of the data points max recorded were 177 centimeters. c) a data point chosen at random is as likely to be above the mean as it is to be below the mean. d) every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.

What’s 8y+48 and factor each expression completely

X^2/100+y^2/25=1 the length of the major axis is: a)5 b)10 c)20