Which of the following values have 3 significant figures? Check all that apply.

How many days was the temperature above 90 degrees?

Which of the expressions (on the photo document i inserted) together represent all solutions to the following equation? 8cos(12x)+4=-4 *the answer should be in degrees.* > i would like for someone to explain the process to find the solutions for this.

60 2(x + 2) in the diagram, gef and hef are congruent. what is the value of x?