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Sunny_sXe [5.5K]
2 years ago
14

John's cell phone gives him 1250 minutes for $25. He used 1300 minutes. How much will his cell phone company bill him for? A) Si

nce 1250 rounds to 1300, the company will not charge him for the extra 50 minutes. Eliminate B) John will get his regular $25 charge plus charges for the additional 50 minutes. C) He will get a bill for $25.50. D) He will get a bill for $50.
Mathematics
2 answers:
Flauer [41]2 years ago
8 0

Answer:

c

Step-by-step explanation:


const2013 [10]2 years ago
3 0

Answer:

John will get his regular $25 charge plus charges for the additional 50 minutes.  this is the correct answer because i got it wrong and it told me this.

Step-by-step explanation:

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A three pack of bar soap had a wholesale cost of $1.15. A pharmacy wants to sell this product with a markup of 60%. What are the
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To find the percentage of something, simply multiply the percentage (converted into a decimal) and the total. 60% = 0.6. 0.6*1.15 = 0.69. 
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Graph the equation y=2/3(x+7)(x+1) ​
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Solve the equation 3=4-5\root(3)(x^(8))
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Find the volume V of the solid obtained by rotating the region bounded by the given curves about the specified line. y = x, y =
miss Akunina [59]

Answer:

381.18 cubic units

Step-by-step explanation:

Graph the region:

desmos.com/calculator/iwvreqjz2m

The region is a trapezoid.  When we rotate it about x = 1, we get a hollow cylinder shape.  We can either use washer method or shell method to find the volume.

If we find the volume using washer method, we'll have to use two integrals, one for the triangular part of the trapezoid and one for rectangular part.  If we use shell method, we only need one integral.  So let's use shell method.

Cut a thin, vertical slice of the region.  The width of this slice is dx.  The height of the slice is y₂ − y₁ = x − 0 = x.  The radius of the shell is x − 1.

The volume of the shell is:

dV = 2π (x − 1) (x) dx

dV = 2π (x² − x) dx

The total volume is the sum of all the shells from x=5 to x=7.

V = ∫ dV

V = ∫₅⁷ 2π (x² − x) dx

V = 2π ∫₅⁷ (x² − x) dx

V = 2π (⅓ x³ − ½ x² + C) |₅⁷

V = 2π [(⅓ 7³ − ½ 7² + C) − (⅓ 5³ − ½ 5² + C)]

V = 2π [⅓ 7³ − ½ 7² − ⅓ 5³ + ½ 5²]

V = 2π [⅓ (7³ − 5³) + ½ (5² − 7²)]

V = 2π [⅓ (218) + ½ (-24)]

V = 2π (72⅔ − 12)

V = 121⅓ π

V ≈ 381.18

The volume is approximately 381.18 cubic units.

6 0
2 years ago
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