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Otrada [13]
4 years ago
11

The concentration of platinum in a necklace is 7%. The necklace weighs 16 g. Find the amount of platinum in the necklace.

Mathematics
1 answer:
Sophie [7]4 years ago
4 0
1.12g of platinum is in the necklace.
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If the dimensions of the following cylinder are doubled, what will be the surface area of the new cylinder? 1,406.72 in. 2 2,813
ryzh [129]

Based on the calculations, the surface area (SA) of a cylinder is equal to: B.  2,813.44 in.²

<h3>How to calculate surface area of a cylinder?</h3>

Mathematically, the surface area (SA) of a cylinder can be calculated by using this formula:

SA = 2πrh + 2πr²

<u>Where:</u>

  • h is the height.
  • r is the radius.

The dimensions of this new cylinder would be equal to:

Radius = 8 × 2 = 16 in.

Height = 6 × 2 = 12 in.

Substituting the given parameters into the formula, we have;

SA = (2 × 3.14 × 16 × 12) + 2 × 3.14 × 16²

SA = 1,205.76 + 1,607.68

SA = 2,813.44‬ square inches.

Read more on surface area here: brainly.com/question/26396269

#SPJ1

<u>Complete Question:</u>

If the dimensions of the following cylinder are doubled, what will be the surface area of the new cylinder? Radius: 8 in and Height: 6 in.

Group of answer choices.

A. 1,406.72 in.²

B.  2,813.44 in.²

C. 1,607.68 in.²

D. 5,626.88 in.²

7 0
2 years ago
How many ways can I make 57 cents using no more than 5 pennies
ki77a [65]

Answer: 2 quarters, a nickel, and 2 pennies

Step-by-step explanation:

4 0
4 years ago
Simplify this expression: -2(-4x + 2y - 6)
Monica [59]

Answer:

8x - 4y + 12

Step-by-step explanation:

-2(-4x + 2y - 6)

(-2)(-4x) + (-2)(2y) + (-2)(-6)

(2 * 4x) - (2 * 2y) + (2 * 6)

8x - 4y + 12

4 0
3 years ago
A calculator that didn't follow the rules for order of operations gave the value 36 for the expression 8+n*3. What is the value
shusha [124]
N=9
9 \times 3 = 27 \\ 27 + 8 = 35
n=9.333333333333333
9.333333333333333 \times 3 = 28 \\ 28 + 8 = 36
that is 15 3's by the way.
6 0
3 years ago
4x3-5x2-17x-8 divided by x+1
LenaWriter [7]

Answer:

4x2 - 9x - 8

Step-by-step explanation:

7 0
3 years ago
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