How many seconds on a day

There are 86,400.

Step-by-step explanation:

This is because there are 60 seconds in one minute. Then you need to times 60 by 60 to see how many seconds there are in a hour. Then you times that by 24 because there are 24 hours and that is your answer. I will show my work below:

60 (how many seconds there are in a minute)

60 (how many minutes there are in a hour)

24 (how many hours there are in a day)

60 x 60 (for the amount of seconds there are in a minute and how many minutes in a hour). Which 60 x 60 = 3600

Then, take that seconds in a hour and times it by 24 because there isn't 1 hour in a day, and it isnt asking how many seconds are in a hour, it is asking how many seconds there are in a DAY.

3600 x 24 = 86400

So, there are 86,400 seconds in one day! :D

Good luck on your test!

86 400

Step-by-step explanation:

Using the conversions

1 minute = 60 seconds

1 hour = 60 minutes

1 day = 24 hours, then

seconds in a day = 60 × 60 × 24 = 86 400

3

step-by-step explanation:

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.