Students in Room 2A are adding fractions. Look at the problem below. +
9
First they rewrite
9
The students made this change by

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?

If the scale factor between two circles is 2x/5y what is the ratio of their areas?

The ratios of boys to girls on a soccer league is 2: 5. if there are 28 boys, how many girls are playing soccer? extra points! will mark as brainiest asap