In Houston, Texas, at the spring equinox (March 21), there are 12 hours and 9 minutes of sunlight. The longest and shortest day of the year varies from the equinox by 1h 55 min . The amount of sunlight during the year can be modeled by a sine function.

d. Estimation Use your function from part (c). In Houston, about how much less sunlight does February 14 have than March 21 ?