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sergey [27]
3 years ago
14

13. A jeweller bought an engagement ring for €1200 and

Mathematics
2 answers:
zavuch27 [327]3 years ago
4 0

Answer:

€ 1380

Step-by-step explanation:

The jeweller bought the ring for €1200 and got a profit of 15% when he sold it. That means,

=  \frac{15}{100}  \times 1200 \\  = 180

he got €180 more money (which is equivalent to 15% of the portion of the money that he originally paid for the ring).

So, the selling price (the new price of the ring) would be:

= Original price + profit

= €1200 + €180

= €1380

maks197457 [2]3 years ago
3 0

Answer:

CP of ring = 1200

profit % = 15%

Profit amount = 15% 0f 1200 = 180

SP = 1200 + 180 = 1380

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Classify the shapes based on their volumes.
shepuryov [24]

Answer:

1.  volume of cone = 288π cube units

2.  volume of cylinder = 972π cube units

3.  volume of sphere = 288π cube units

4.  volume of cylinder = 288π cube units

5.  volume of sphere = 972π cube units

6.  volume of cone = 972π cube units

Step-by-step explanation:

1.  Radius of cone (r) = 12units

height of cone(h)  = 6units

volume of cone = π/3r²h  

=π/3.12.12.6

=π.12.12.2

=288π cube units

2.  diameter of cylinder(d) = 12units

radius of cylinder (r) = 6units

height of cylinder (h) = 27 units

volume of cylinder = πr²h

= π.6.6.27

= 972π cube units

3.   diameter of sphere = 12 units

radius of sphere = 6 units

volume of sphere = 4π/3.r³

= 4π.2.6.6

= 288π cube units

4.  diameter of cylinder (d) = 8 units

radius of cylinder (r) = 4 units

height of cylinder(h) = 18units

volume of cylinder = πr²h

= π.4.4.18

= 288π cube units

5.   radius of sphere(r) = 9 units

volume of sphere = 4π/3.r³

= 4π/3.9.9.9

= 4π.3.9.9

= 972π cube units

6.  diameter of cone (d) = 18 units

radius of cone (r) = 9 units

height of cone (h) = 36 units

volume of cone = π/3.r².h

= π/3.9.9.36

= π.3.9.36

=972π cube units

4 0
3 years ago
You randomly choose one shirt from the shelves. Find the probability of the event of not choosing a a white shirt
Luba_88 [7]

Answer:

9/10

Step-by-step explanation:

5 0
3 years ago
The manufacturer of a CD player has found that the revenue R (in dollars) is R(p)= -4p2+1200p, when the unit price is p dollars.
qaws [65]

Answer: 9000$

Step-by-step explanation:

Let 's use the formula to find the vertex of the parabola:

ax²+bx+c=0

\displaystyle x_v=-\frac{b}{2a}  \\\\  Where :\\\\ y_v- maximum \ \  income \\\\ y_v=a(x_v)^2+bx_v+c \\\\ Then \ in \ \ our \ \ case : \\\\ -4p^2+1200p =0 \\\\ x_v=-\frac{1200}{-4\cdot 2} =150 \\\\  y_v=-4\cdot (150)^2+150\cdot 1200 \\\\ y_v=150\cdot 1200-150\cdot 600 \\\\ y_v=600\cdot 150=\bf 9000 \

4 0
3 years ago
Harlp needed ok thanks dudes
Ivanshal [37]

Solution:

<u>A few definitions...</u>

  • Rational number - Any integer, fraction, terminating decimal, or repeating decimal is classified as a rational number
  • Irrational number - All the real numbers which are not rational numbers.

<u>Option A - Rational or Irrational?</u>

  • 1/2 + 1/3

Since both are known as fractions, they are rational numbers.

<u>Option B - Rational or Irrational?</u>

  • √2 + 5/2

√2 is classified as an Irrational number because if it is simplified, it does not result in any integer, fraction, terminating decimal, or repeating decimal.

<u>Option C - Rational or Irrational?</u>

  • 1/√4 + 7/2
  • => 1/2 + 7/2
  • => 8/2 = 4

Since this is an integer, this is rational.

<u>Option D - Rational or Irrational?</u>

  • √9 + √4
  • => √3 x 3 + √2 x 2
  • => 3 + 2 = 5

Since this is an integer, this is rational.

In conclusion...

Option B is correct.

8 0
2 years ago
If 30 veggie burgers were served, how many hamburgers
umka2103 [35]

Answer:

5 to 12

Step-by-step explanation:

It works

3 0
3 years ago
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