Final answer:
The correct decimal to watch for on the digital pressure gauge when adding air to a tire with a required pressure of 25 29/200 psi is 25.145 pounds per square inch, thereby making option b) the correct choice.
Step-by-step explanation:
To find the decimal equivalent of the air pressure in the tire, which should be 25 29⁄200 pounds per square inch, we first need to convert the fractional part (29⁄200) into decimal form.
Dividing 29 by 200, you get 0.145. Therefore, the air pressure in decimal form is 25.145 pounds per square inch, so the digital pressure gauge should read the following:
- a) 25.14 - Incorrect, this is rounded down and not precise enough.
- b) 25.145 - Correct, this is the precise conversion of the fraction.
- c) 25.1455 - Incorrect, this adds an additional digit not present in the fraction.
- d) 25.14545 - Incorrect, this adds multiple additional digits not present in the fraction.
The gauge should show 25.145 psi, thus the correct answer is option b) 25.145.