During the month of february, the depth,d, of snow in inches at the base of one ski resort can be approximated by adding 7 to twice the number of days, t, since Jan. 31.

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To find the depth of snow in inches at the base of the ski resort during the month of February, you can use the given formula: d = 7 + 2t, where d represents the depth of snow and t represents the number of days since January 31.

To find the depth of snow on a specific day in February, you need to know the number of days since January 31 for that particular day. Once you have the number of days, you can substitute it into the formula and calculate the snow depth.

For example, let's say you want to find the depth of snow on February 15. To find the number of days since January 31, you need to count the number of days between January 31 and February 15. In this case, it would be 15 days.

Substituting the value of t into the formula, we get:
d = 7 + 2(15)
d = 7 + 30
d = 37 inches

Therefore, the depth of snow on February 15 would be approximately 37 inches at the base of the ski resort.