X: 4 units of a and 5 units of b per hour
y: 3 units of a and 10 units of b per hour
cost to run machine x: $22/hr
cost to run machine y: $25/hr
4x + 3y = 90
5x + 10y 2 150
x20
y 20
x=number of hours machine x runs
y=number of hours machine y runs
the objective function is c=
y.

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

2 over 5 and 4 over 15

don’t know last one sorry

step-by-step explanation:

why are you giving so many marks make your marks less and make a question list so that i can understand your question very nicely