What were some of the main social problems faced by america in the 1950s?

Select the equations in which w=100 makes the equation true. select all that apply. a.) 0.54÷w=0.0054 b.) 4,086÷w=4.086 c.) 362.7÷w=3.627 d.) 5.3÷w=0.0053 e.) 21.9÷w=0.219

Need on these last 2 questions on my social studies homework 5 and 6 then i’m done with the homework

What deadly disease cost many workers their lives before dr. william gorgas found a treatment?