Acidity is measured on the ph scale. the acidity of a substance is given by ph=−logh, where h is the concentration of hydrogen ions. if a substance has a ph of 6, which equation could be used to find its h value?

Which inequality comparing two of the expressions is true when 0.7 < x < 0.9

Elena is paid a constant rate for each hour she works. the table shows the amounts of money that elena earned for various amounts of time that she worked.

Acompany manufactures three types of cabinets. it makes 110 cabinets each week. in the first week, the sum of the number of type-1 cabinets and twice the number of type-2 cabinets produced was 10 more than the number of type-3 cabinets produced. the next week, the number of type-1 cabinets produced was three times more than in the first week, no type-2 cabinets were produced, and the number of type-3 cabinets produced was the same as in the previous week.