At a local tearoom, I couldn't help noticing that at one table, where the customers had eaten six buns and had three teas, the bill came to £4.35. At another table, the customers had eaten 11 buns and had seven teas at a total cost of £8.80. My family and I had five buns and six teas. What did it cost us?

step-by-step explanation:

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