Mr.Customs is correcting the classes math home work on customary units. which of the following measurements are reasonable?

A. a pencil is 12 ft. long.
B. The back porch is 12 inches long
C. the 3rd hole on the golf course is 123 miles long.
D.the distance between New York and California is 2,250 miles.***********

looks good

To determine which of the following measurements are reasonable in customary units, we need to have a basic understanding of the customary unit conversions. Here are some common conversions:

12 inches = 1 foot
1 mile = 5,280 feet

Let's go through each option to determine its reasonability:

A. "A pencil is 12 ft. long." - Since pencils are usually much smaller, this measurement does not seem reasonable. Therefore, option A is not reasonable.

B. "The back porch is 12 inches long." - Since a foot is made up of 12 inches, it is quite reasonable for a back porch to be 12 inches long. Therefore, option B is reasonable.

C. "The 3rd hole on the golf course is 123 miles long." - Since a hole on a golf course is relatively small, it is not reasonable for it to be 123 miles long. Therefore, option C is not reasonable.

D. "The distance between New York and California is 2,250 miles." - Considering the geography of the United States, it is reasonable for the distance between New York and California to be 2,250 miles. Therefore, option D is reasonable.

By going through the correct conversions and analyzing the context of each measurement, we can determine which options are reasonable. In this case, the reasonable options are B and D.