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Lady_Fox [76]
3 years ago
12

Please help with this Khan Question :)

Mathematics
1 answer:
astraxan [27]3 years ago
4 0

Answer:

the answer is A

Step-by-step explanation:

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A new phone costs $230 and the sales tax rate is 7%. What is the total cost of the camera after tax?
rosijanka [135]

That's a question about percentage.

One way to represent percentage is using decimal number. In this way, 1 is equivalent to 100% and the other less percentages using numbers between 0 and 1.

Examples:

  • 90% is equivalent to 0,90.
  • 5% is equivalent to 0.05. It's not 0.5 because 0.5 is equivalent to 50%.
  • 13.17% is equivalent to 0.1317.
  • 245% is equivalent to 2.45.

If we want to know the percentage of a number, we should multiplacate the number by the porcentage in the decimal number form.

Examples:

  • 55.90% of 200 is equal to: 200 \times 0.5590 = 111.8
  • 360% of 88 is equal to: 88\times 3.6 = 316.8

In our problem, we have a phone with a increase of 7%. To solve that, it's important to perceive that $230 is equal to 100% and with a increase of 7%, we will pay 107%.

107% in the decimal number form is 1.07. With that information, we should multiplicate 1.07 by the original value and we will find the answer.

We know that 230\times 1.07 = 246.1, therefore, the total cost of the phone after tax is $246.1.

I hope I've helped. :D

Enjoy your studies. \o/

4 0
3 years ago
Please Help me answer all 4 questions with a full explanation so I can solve the rest on my own.
Nata [24]

\\ \rm\Rrightarrow (2x^2)^3.2yx^0=8x^6.2y=16x^6y

\\ \rm\Rrightarrow (2x^4y^3)^3.2x^4y^4=8x^{12}y^6.2x^4y^4=16x^{16}y^{10}

\\ \rm\Rrightarrow (m^3n^0(2m^3n^2)^4)^2=(m^316m^{12}n^8)^2=(16m^{15}n^8)^2=256m^{30}n^{16}

\\ \rm\Rrightarrow (2xy^3)^2.2x^2y^0=4x^2y^6.2x^2=8x^4y^6

6 0
2 years ago
What is the area of the square?<br> 2 m<br> square meters
Mariulka [41]

Answer:

4m

Step-by-step explanation:

the ratio to find a square’s area is <em>side length</em> times <em>side length</em>, i.e.

sl * sl = a

2m * 2m = 4m

hope this helps!

5 0
2 years ago
Read 2 more answers
mrs. Hudson invested $700 into an account that draws 3% interest, compounded annually. what is the total value of the account af
nadezda [96]
700 x .03 x 20 = 420
420 + 700
1120 is in the account after 20 years
7 0
3 years ago
Is 52800 cm greater than i kilometer
Valentin [98]
79. Is 52 800 centimeters greater than 1 kilometer? According to the unit of conversion in every 1 kilometer, there is a total of 100 000 centimeters. Now, the given value of centimeters is equals to 52 800 => 1 km = 100 000 cm => 52 800 cm is less than the value of 100 000 cm which is equivalent to 1 km. Thus, the given is not correct. 52 800 cm is less than 1 kilometer.
6 0
3 years ago
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