Pls do these for me pl

What are the soultion(s) to the quadratic equation 40- x^2=0

Arefrigeration system at your company uses temperature sensors fixed to read celsius (°c) values, but the system operators in your control room understand only the fahrenheit scale. you have been asked to make a fahrenheit (°f) label for the high temperature alarm, which is set to ring whenever the system temperature rises above –10°c. what fahrenheit value should you write on the label

Which spreadsheet would be used to compute the first nine terms of the geometric sequence a^n=32•(1/2)n-1