At the market 5 light bulbs cost 9 dollars how mush does 7 light bulbs cost?

So first off we need to figure out how much each light bulb cost. So 5 divided by 9= 1.8. so each light bulb cost $1.80.  To figure out how many 7 light bulbs cost multiply 7 by 1.8 which equals 12.6. So 7 light bulbs cost $12.60

113.1

step-by-step explanation:

v=4

3πr3=4

3·π·33≈113.09734

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