Final answer:
To calculate the new diameter of the basketball hoop after a 10% decrease, you subtract 10% of the current 18 inches (which is 1.8 inches) from the original diameter, resulting in a new diameter of 16.2 inches.
Step-by-step explanation:
The question involves calculating the new diameter of a basketball hoop if it is decreased by 10%. The current diameter of the hoop is 18 inches.
To find the new diameter, first determine what 10% of 18 inches is. To do this, use the following calculation:
10% of 18 inches = 0.10 × 18 inches
10% of 18 inches = 1.8 inches
Next, subtract the 10% from the original diameter to get the new diameter:
New diameter = 18 inches - 1.8 inches
New diameter = 16.2 inches
Therefore, the basketball hoop's diameter will reduce by 1.8 inches, resulting in a new diameter of 16.2 inches.