250 students took a test and the data was normally distributed with a mean of the data being 70 and a standard deviation of 5 how many students scored above 65 on the test

In the field of thermodynamics, rankine is the unit used to measure temperature. one can convert temperature from celsius into rankine using the formula c= r/1.8 - 273, what is the temperature in celcius corresponding to r degrees rankine.

Use the graph of the sine function y=2sinθ shown below

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'