The cost of electricity in a certain city is 0.08 for each of the first 300 kwh and $0.13 for each kilowatt-hour over 300 kwh. find the number of kilowatt-hours used by a family that receives a $55.20 electric bill

The answer to your question is: The family consumed = 540 kWh

Step-by-step explanation:

Data

$ 0.08 for each of the first 300 kWh

$0.13 for each kWh over 300 kWH

Electric bill = $55.20

First, calculate if the family consume more than 300 kWh

                          300 x 0.08 = $24  that is lower than $55.2 so they consume more than 300 kWh

Calculate the difference between what they pay and the cost of 300 kWh

                             $55.20 - 24 = $ 31.2

Now, rule of three

                             1 kWh   $0.13

                             x            $31.2

           x = (31.2)(1) / 0.13 = 240 kWh

The family consumed = 300 + 240 = 540 kWh

answer: given that the roller coaster can accommodate 1600 riders per hour, thus the roller coaster can accomodate 1600 / 60 = 26.67 riders per minute.

given that there are 345 people in the line, the number of minutes it will take for the 345 persons to get into the roller coaster is given by 345 / 26.67 = 12.94 minutes.

therefore, it will take you 12.94 minutes to get to the front of the line.

step-by-step explanation:

2 & 7

step-by-step explanation:

he climbs 300 ft/hr at a constant rate. the peak is at 1,500 ft.

when going up, he reaches 600 ft in 2 hours. remember, that he is going in a constant rate. divide 600 with 300:

600/300 = 2

assuming that he takes the same route back (meaning that it's a 1500 ft route back, you can solve.

note also that you are solving when he gets back to 600 ft after he reaches the peak.

first, find the amount of hours it takes to get up the peak. divide the total amount (1500), with the ft/her (300) to get the amount of hours (x):

1500/300 = x

x = 5

it takes jamie 5 hours to get up. now, he is returning down, and reaches 600 (his current destination). remember that he climbs at a constant 300 ft/hr. divide 600 with 300:

600/300 = x

x = 2

now add the two numbers together.

x = 5 + 2 = 7

jamie takes 7 hours to go up the mountain and reach his current position when descending.

(total amount/constant rate) = (time).

remember that it is a constant rate, so in total, when he gets back down the mountain, it will take the same amount of time as when he goes up. the total amount for the round trip is: 5 + 5 = 10.

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