подскажите как решать неравенства с аркосинусами и арксинусами

Определите степень окисления 1.h2s+02->so2+H20 2. H2S+02->S=H20

complete the text with am,is,are or,aren't.

    Jane is going to be  very busy next week.On Monday Jane is going to visit her dentist.on Tuesday Jane and her sister ... going to visit their sick granny.

    When ... she going to arrange her birthday party? - On Saturday.Her classmates ... going ti giveher a little puppy.Jane loves pets.Where ... she going to walk her puppy? - In the park.Jane's parents ... going to give her a trip to London, ... they? ... you going to come to her birthday party? - Yes,I ...