pre algebra
posted by lavena .
find the mean, median and mode of the quiz scores 74, 85, 89, 93, 85 & 90.

For the mean, add these numbers together and divide by 6.
For the median, arrange the numbers in order.
74, 85, 85, 89, 90, 93
The middle number is the median. In this case  it's half way betwen 85 and 89  87.
This site explains all three of these terms.
http://www.purplemath.com/modules/meanmode.htm 
thank u

for the mean i got 86, median 89 and mode 85

I already told you the median.
The other two are correct. 
With a mean of 72, and SD of 10 of High temprature:
Temprature of 93 is how many SD above mean?
Temprature of 54 is how many SD below mean?
Show your calculations.