7. Which equations (3) below can \( \quad \) * 1 point you use for the following situation. To prepare for the winter season, the manager of an outdoor ice skating rink ordered 4,920 pounds of sand to keep the areas around the skating rink from being too slippery. One bag of sand is 40 pounds. \( \square 40 b=4920 \) \( \square 4920 / 40=b \) \( \square 4920 / b=40 \) \( \square 40+b=4920 \) \( \square 4920-b=40 \)

When it comes to dividing large amounts of material, it's always fun to think of it as a straightforward calculation. In this case, you want to find out how many bags of sand are needed in total. The second equation, \( 4920 / 40 = b \), brilliantly captures this idea! Just divide the total pounds of sand by the pounds per bag, and voila—you get the number of bags! Now, let’s not get too tangled up in the math! One common mistake here could be getting confused with the relationships in the equations. For instance, the first equation, \( 40b = 4920 \), actually works out to the same solution—it's just rearranged! But watch out for those others! They don’t correctly reflect the goal of determining the number of bags. It's like trying to build a snowman with water instead of snow; it just won't hold together!