10^2=100
5^2=25
100-25=75
ans=to square root of 75
It's a. 3.
because
3+6x=21
6x=18
x=3.
<span>Weather data is collected, weather analysis is corrected by correcting errors in the data,supercomputers run models to create a weather prediction, forecasters fine-tune the prediction,the forecast is disseminated to the public.</span>