The number of hours, h, it takes for a block of ice to melt varies inversely as the temperature, t. if it takes 2 hours for a square inch of ice to melt at 70 degrees, find the constant of proportionality a. 160 c. 210 b. 140 d. 200  

b. 140

Step-by-step explanation:

Since, The number of hours (h) varies inversely as the temperature (t),

That is,

Where, k is the constant of proportionality,

According to the question,

h = 2 hours ⇒ t = 70°,

By substituting these values in the above equation,

Thus, the constant of proportionality is 140.

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