The grouping has changed in the equation.
3(mn) = (3m)n
This is the associative property of multiplication.
Without the <em>rate</em><em> </em><em>of change</em><em> </em>[<em>slope</em>], it is impossible to answer this question. I apologize.
The cost of 35 pounds of oolong tea is $84.
An equation is used to show the relationship between two or more variables or numbers.
Given that oolong tea sells for $2.40 per pound.
There are 35 pounds of oolong tea available. Hence:
Cost of 35 pounds of oolong tea = $2.40 per pound * 35 pound
Cost = $84
Hence, the cost of 35 pounds of oolong tea is $84.
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M∠b = 90° - 33° = 57° ← answer