To find the time it takes for a ladybug to crawl up a 10-foot section of wall at a speed of 3 inches per second, it’s important to use consistent units throughout the calculation. Given that the ladybug's speed is in inches per second, it makes sense to convert the height of the wall from feet to inches.
Since 1 foot is equal to 12 inches, convert 10 feet to inches:
\[ 10 \text{ feet} \times 12 \text{ inches/foot} = 120 \text{ inches} \]
Now you can use the formula relating distance, velocity, and time:
\[ \text{Distance} = \text{Velocity} \times \text{Time} \]
To find the time it takes for the ladybug to crawl up the wall, rearrange the formula to solve for time:
\[ \text{Time} = \frac{\text{Distance}}{\text{Velocity}} \]
Substituting in the values:
\[ \text{Time} = \frac{120 \text{ inches}}{3 \text{ inches/second}} = 40 \text{ seconds} \]
Thus, the time it takes for the ladybug to crawl up the 10-foot section of wall is 40 seconds. The best unit conversion in this scenario was converting feet to inches.