How many joists spaced 19 in. o.c. (on center) are required for a floor 418 in. long? (Add one joist for a starter.) $$ \square $$ joists are required for a floor. (Type a whole number.)

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To determine the number of joists required for a floor that is 418 inches long, with joists spaced 19 inches on center, we need to calculate the total number of joists needed.

Given:
- Floor length = 418 inches
- Joist spacing = 19 inches on center

To find the number of joists required, we can use the formula:
$$ \text{Number of joists} = \frac{\text{Floor length}}{\text{Joist spacing}} + 1 $$

Substitute the given values into the formula:
$$ \text{Number of joists} = \frac{418}{19} + 1 $$

Now, we can calculate the number of joists required.
Calculate the value by following steps:
- step0: Calculate:
  $$\frac{418}{19}+1$$
- step1: Divide the terms:
  $$22+1$$
- step2: Add the numbers:
  $$23$$
To find the number of joists needed, divide the floor length by the spacing and add one for the starter joist. So, $$ \frac{418}{19} + 1 = 22 + 1 = 23 $$ joists are required.

How many joists spaced 19 in. o.c. (on center) are required for a floor 418 in. long? (Add one joist for a starter.) \( \square \) joists are required for a floor. (Type a whole number.)

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