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3 years ago

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A convex polyhedron is made of 12 congruent faces like the one shown below. What is the name of the solid? A) dodecahedron ANSWE

R: A B) icosahedron C) pentagonal pyramid D) pentagonal prism

1 answer:

Anvisha [2.4K]3 years ago

6 0

Answer: dodecahedron

Step-by-step explanation:

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Suppose you choose a marble from a bag containing 3 red marbles. 3 white marbles, and 5 blue marbles. You return the first marbl

Flauer [41]

Answer:

15/121.

Step-by-step explanation:

Probability of picking a red = number of reds in the bag / total number of marbles in the bag

= 3 / (3 + 3 + 5)

= 3/11.

Probability of picking a blue = 5/11.

These 2 events are independent so we multiply probabilities, therefore the

Probability of (a red then a blue) = 3/11 * 5 /11

= 15/121.

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4 years ago

Currency exchange rates are based on

olga55 [171]

Answer:

Currency prices can be determined in two main ways: a floating rate or a fixed rate. A floating rate is determined by the open market through supply and demand on global currency markets. Therefore, if the demand for the currency is high, the value will increase.

Step-by-step explanation:

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3 years ago

The ratio of the perimeters of two rectangles is 4 to 7. The perimeter of the larger rectangle is 42 inches. What is the perimet

Mumz [18]

In this question, there are numerous information's of immense important already given. Based on those given information's the answer to the question can be easily deduced.
Ratio of the perimeter of two rectangles = 4:7
Perimeter of the larger rectangle = 42 inches
Let us assume the common ratio = x
Then
7x = 42
x = 42/7
= 6
Then
Perimeter of the smaller rectangle = 4 * 6 inches
= 24 inches.
So the perimeter of the smaller rectangle is 24 inches. I hope the procedure and the answer is clear enough for you to understand. Based on this procedure, you can attempt similar problems without requiring any outside help.

4 0

4 years ago

F(x)=-3/5x+k and if f(30)=-11 what is the value of k

Kruka [31]

Answer:

k=20.

Explanation: First we find where f(x) has its local extrema: f'(x)=3x2−10x+3. The critical points are roots of the equation: 3x2−10x+3=0.

6 0

3 years ago

HELP me with These questions

Feliz [49]

Answer: 13.96 in²

<u>Step-by-step explanation:</u>

radius (r)

d = 2r

16 = 2r

8 = r

angle in radians (θ)

$\frac{180}{\pi} =\frac{25}{\theta}$

180(θ) = 25(π)

θ = $\frac{25}{180}\pi$

θ = $\frac{5}{36}\pi$

Area (A)

A = $\frac{1}{2}$ r² θ

= $\frac{1}{2}(8)^{2}(\frac{5}{36}\pi)$

= $\frac{40}{9}\pi$

= 13.96

*************************************************************************

Answer: 12π

<u>Step-by-step explanation:</u>

s = rθ

= 60 $(\frac{\pi }{5})$

= 12π

*************************************************************************

Answer: 22.440 cm²

<u>Step-by-step explanation:</u>

A = $\frac{1}{2}$ r²θ

= $\frac{1}{2}$ (10)² $(\frac{\pi} {7})$

= $\frac{50}{7}\pi$

= 22.440

*************************************************************************

Answer: 270°, 630°, -450°, -810°

<u>Step-by-step explanation:</u>

positive: -90 + 360 = 270

270 + 360 = 630

negative: -90 - 360 = -450

-450 - 360 = -810

*************************************************************************

Answer: $\frac{3\pi} {4}$

<u>Step-by-step explanation:</u>

$\frac{19\pi} {4} - 2\pi$

= $\frac{19\pi} {4} - \frac{8\pi} {4}$

= $\frac{11\pi} {4}$

$\frac{11\pi}{4} - 2\pi$

= $\frac{11\pi} {4} - \frac{8\pi} {4}$

= $\frac{3\pi} {4}$

If you subtract another 2π, you will end up with a negative value. The question asks for the smallest positive value.

5 0

4 years ago