What does the ' mean in 12 degrees and 15'

Write the equation in logarithmic form e^x=403.429

72 the length of a side of a triangle is 36. a line parallel to that side divides the triangle into two parts of equal area. find the length of the segment determined by the points of intersection between the line and the other two sides of the triangle.

You eat $0.85 for every cup of hot chocolate you sell. how many cups do you need to sell to earn $55.25