How is radar used to forcast weather?]
A. It shows areas of high and low pressure
B, It collects data in the upper atmosphere
C. It collects weather data as part of a network around the country.
D. It locates and tracks storms, and follows the path of storm systems

D

Explanation:

Weather radar is used to locate precipitation, calculate its motion, and estimate its type

d

Explanation:

the ideal gas law equation is as follows

pv = nrt

where p - pressure

v - volume

n - number of moles

r - universal gas constant

t - temperature

so if the pressure, volume and temperature are already known

we are left with n and r

since r is the universal gas constant that has a known fixed value then r too is known

so we are left with 'n'

once we know temperature volume and pressure

we can find the number of moles of gas present using the ideal gas law equation

this is not my own answer, this is an answer for the same question by the user blahblahmali. i do not claim ownership of this account.