There are 82 people in a restaurant. Four groups of 3 leave and then five groups of 2 enter. Evaluate the expression 82 - 4(3) + 5(2) Find how many people are in the restaurant.

80

Step-by-step explanation:

82-12+10

82+10-12

92-12

80

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