A spinner with 12 equally sized slices has 5 yellow slices, 3 red slices, and 4 blue slices. The dial is spun and stops on a slice at random. What is the probably that the dial stops on a yellow or red slice?
Write your answer as a fraction in simplesta form

570, the answer is 570, hope it

1,407.5 hours

step-by-step explanation:

we first convert all the time to hours and then sum them up.

there are 24 hours in 1 day, in 58 days, there are 24 x 58 = 1,392 hours.

there are 60 minutes in 1 hour, thus, 30 minutes will be equivalent to 30 / 60 = 0.5 hours.

therefore, the number of hours it will take mercury to complete a full rotation is 1,392 + 15 + 0.5 = 1,407.5 hours