Matematyka wokół nas 4.2 zad 6 str 29 proszę o odpowiedź ​

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

You use technology ans find a sum of 6.712e-8. write this sum in standard form

In triangle abc, angle c is a right angle. find the value of the trig function indicated. find tan a if c = 17 and a = 8