Student A measures an object and records a value of 1.5 cm. Student B measures the same object and records a value of 1.50 cm. They have both done their measurements correctly. Why do these measurements differ? A)Person A rounded their measurement. B)They aren’t different. C)Person A used a ruler with markings every 0.1 cm. Person B used a ruler with markings every 0.01 cm. D)Person A used a ruler with markings every 1 cm. Person B used a ruler with markings every 0.1 cm.

B) They aren't different

Explanation:

1.5 is equal to 1.50.

substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.

(b) which contains higher levels of vitamin b, oranges or spinach?

explanation:

you can eliminate a, c, and d because they are questions based on opinions.