What is the value of b in the equation below?
9-89-2-a
-10
-6
9
16

Steps to solve:

9 - 89 - 2 - a

~Combine like terms

-80 - 2 - a

-82 - a

Best of Luck!

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

step-by-step explanation:

d would equal 12