Lily likes to collect records. Last year she had 15 records in her collection. Now she has 24 records. What is the percent increase of her collection?
The percent increase of her collection is %.

Customers at an ice-cream shop took a survey .the results showed that 144 customers rated the shop as being "very satisfactory ."this number represented 45%of the total nunber of customers who took the survey

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?

Explain how you do each step what term makes it inconsistent y=2x - 4 ?