Which sentence is punctuated correctly?

a.
the alarm clock is set to wake me at 7: 40 a. m.

b.
the sun will rise at 5; 15 a. m.

c.
is "a quarter after three" the same as 3.15?

d.
the rocket launches in 50 minutes, at 810 a. m.

Question 10 (10 points)which of the following tones correctly matches the topic of writing? writing a research paper about the industrial revolution with an informal tonewriting a magazine column on the latest relationship drama in hollywood with amaltonewriting a blog post for a lifestyle website with an informal tonefor business research with an informal tone