A light bulb consumes 1440 Watt hours per day.. how long does it take to consume 6840 watt- hours

4 days and 18 hours.

Step-by-step explanation:

1440 Watt hours = 1 day

6840 Watt hours = x

Cross multiply.

1440*x = 6840*1

1440x = 6840

Divide both sides by 1440.

1440x/1440 = 6840/1440

x = 4.75 days

4.75 days is 4 days and 3/4 of a day; because 3/4 = 0.75

We have to find 3/4 of 1 day.

1 day is 24 hours.

3/4* 24

Divide 24 by 4.

3*6 = 18

So, 18 hours.

Therefore a light bulb consumes 6840 Watt hours in 4 days and 18 hours.

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rick has $1400 and sally has $1500

step-by-step explanation:

to find amount of money rick has after 10 years :

principal = $1000 , time = 10 years , rate = 4% annually

to find amount of money sally has after 10 years :

her friend gives to pay her $50 per year, therefore money she has after 10 years = 50 × 10 = $500

also, sally gets $1000 after 10 years,

therefore, total amount of money sally has after 10 years = 500 + 1000 = $1500

so, after 10 years : rick has $1400 and sally has $1500

b mark me branliest thx

step-by-step explanation: