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NemiM [27]
1 year ago
15

An electrician charges an hourly rate of $50, but also charges a fixed fee for making house calls regardless of time spend on th

e job. One day, the electrician earned a total of $250 for a 2 hour job. Write an equation for C,C, in terms of t,t, representing the total cost of the electrician's services if the electrician spends tt hours at the house working.
Mathematics
1 answer:
NISA [10]1 year ago
8 0

Answer:

C=50t+150

Step-by-step explanation:

From the information given, the equation will need to show that the total cost of the electrician services would be equal to 50 that is the hourly rate for the number of hours spent working plus the fixed fee:

Fixed fee=250-(50*2)=250-100=150

According to this, the equation would be:

C=50t+150, where C is the total cost of the electrician's services and t is the number of hours spent working.

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A 20-person fraternity is making their weekend plans around 5 different parties in IV. Each brother will attend exactly one of t
skad [1K]

Answer:

3876

Step-by-step explanation:

Given the following :

Fraternity members = 20

They are to attend 5 different parties in groups of 4

Meaning a group = 4 persons

Atleast one brother will attend exactly one of the parties. (the brothers are indistinguishable).

Then, exactly one brother at a party (20 - 1) = 19, since they are indistinguishable.

Group members are in 4's

19C4

From: nCr = n! /(n-r)! r!

19C4 = 19! / (19 - 4)! 4!

= 19! / 15! 4!

= (19 * 18 * 17 * 16) / (4 * 3 * 2)

= 93024 / 24

= 3876

3 0
2 years ago
An object is moving at a speed of 850 miles per hour. Express this speed in meters per minute. Round your answer to the nearest
lorasvet [3.4K]

Answer:it would be 1385

Step-by-step explanation:because 850 miles per hour converted into meter per min would be 22799.04 meters per sec and then u would Find the number in the whole number place

4

and look one place to the right for the rounding digit on the right side of the decimal point

7

.Round up if this number is greater than or equal to

5

and round down if it is less than

5

1385

5 0
2 years ago
A marine biologist is setting up a net 6 feet below the surface of the water. Each foot of the water screens out 40% of the ligh
rosijanka [135]

Answer:

<u>The correct answer is C. 4.7%</u>

Correct statement and question:

A marine biologist is setting up a net 6 feet below the surface of the water. Each foot of the water screens out 40% of the light coming from the surface. Which of the following is the approximate percentage of light remaining after passing through 6 feet of water, to the nearest tenth of a percent?

0.4%

1.0%

4.7%

7.8%

Source: brainly.com/question/4136163

Step-by-step explanation:

1. Let's review all the information given to us to answer the question correctly:

Depth of the net = 6 feet below the surface of the water

Each foot of the water screens out 40% of the light coming from the surface.

2. Which is the approximate percentage of light remaining after passing through 6 feet of water, to the nearest tenth of a percent?

After one feet: 100 - 40 = 60%

After two feet = 60 - 0.4 * 60 = 60 - 24 = 36

After three feet = 36 - 0.4 * 36 = 36 - 14.4 = 21.6

After four feet = 21.6 - 0.4 * 21.6 = 21.6 - 8.64 = 12.96

After five feet = 12.96 - 0.4 * 12.96 = 12.96 - 5.18 = 7.78

<u>After six feet = 7.78 - 0.4 * 7.78 = 7.78 - 3.11 = 4.67 = 4.7 (Rounding to the nearest tenth)</u>

<u>The correct answer is C. 4.7%</u>

5 0
2 years ago
Rachel is a stunt driver. One time, during a gig where she escaped from a building about to explode(!), she drove to get to the
beks73 [17]

The equation is D=17.5*t

Step-by-step explanation:

Rachel took 4 seconds to reach 70 meters away from the safe zone.

Finding the speed she took to drive away from the safe zone will be;

Speed=Distance/time

S=D/T

S=70/4 =17.5 m/s

D=17.5 * t -----where D is the distance (in meters) from the safe zone after t seconds.

Learn More

To find speed: brainly.com/question/2583051

Keyword : speed, equation, distance

#LearnwithBrainly

4 0
2 years ago
A new car is purchased for 20800 dollars. the value of the car depreciates at 10.75% per year. What will the value of the car be
labwork [276]
The answer is 29,068 cause you to do I =p•r•t
7 0
2 years ago
Read 2 more answers
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