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tatuchka [14]
3 years ago
10

Until 2014, the mass of a kilogram was defined as exactly equal to the mass of a special

Mathematics
2 answers:
Elena L [17]3 years ago
5 0

Answer:

7241.25 mm squared

Step-by-step explanation:

The surface area of a cylinder is denoted by: A=2\pi r^2+2\pi rh, where r is the radius and h is the height.

Here, we know that the diameter is 39.2 mm, and since diameter is twice the radius, then r = d/2 = 39.2/2 = 19.6 mm. We also know that the height is 39.2 mm, so plug these values in:

A=2\pi r^2+2\pi rh

A=2\pi (19.6)^2+2\pi *19.6*39.2=7241.25 mm squared

The answer is about 7241.25 mm squared.

AleksAgata [21]3 years ago
4 0

Answer:

surface area: 7241.25

Step-by-step explanation:

using this formula for surface area of cyclinder: 2πrh+2πr^2

diameter = 2r --> 39.2 = 2r

so r= 19.6

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50 POINTS + BRAINLIEST
BARSIC [14]

slope = rise over run = y/x

A (-1,3) slope = 3/-1 = -3

B (1,2) slope = 2/1 = 2

C (-3,-1) slope = -1/-3 = 1/3

2 lines need to be negative reciprocals in order to be a right triangle

negative reciprocal of -3 is 1/3

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3 0
3 years ago
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Kite FGHK is shown. <br> What is the value of m?
Georgia [21]

For this case, the first thing to do is to observe that the figure is symmetrical with respect to the FH axis.

Therefore, the following lengths are the same:

GH = HK

So, by equalizing both sides we have:

5m + 1 = 3m + 7

From here, we clear the value of m.

We have then:

5m - 3m = 7 - 1\\2m = 6

m = \frac{6}{2}\\m = 3

Answer:

The value of m is given by:

m = 3

4 0
3 years ago
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What are the solutions to the equation?<br> 7x^3=28x
11Alexandr11 [23.1K]

7x³ = 28x is our equation. We want its solutions.

When you have x and different powers, set the whole thing equal to zero.

7x³ = 28x

7x³ - 28x = 0

Now notice there's a common x in both terms. Let's factor it out.

x (7x² - 28) = 0

As 7 is a factor of 7 and 28, it too can be factored out.

x (7) (x² - 4) = 0

We can further factor x² - 4. We want a pair of numbers that multiply to 4 and whose sum is zero. The pairs are 1 and 4, 2 and 2. If we add 2 and -2 we get zero.

x (7) (x - 2) (x + 2) = 0

Now we use the Zero Product Property - if some product multiplies to zero, so do its pieces.

x = 0        -----> so x = 0

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x + 2 = 0  ---> so = x - 2  after subtracting 2 to both sides


Thus the solutions are x = 0, x = 2, x = -2.

6 0
3 years ago
You can use the _______ of a quadratic equation to determine the number and type of solutions
Dennis_Churaev [7]

Answer: Discriminant.


Step-by-step explanation:

1. The quadratic formula is:

x=\frac{-b+/-\sqrt{b^{2}-4ac}}{2a}

2. And the discriminant is inside the square root:

b^{2}-4ac

2. Then, if the discriminant is negative, the quadratic equation does not have real solutions, it has two imaginary solutions. If the discriminant is zero the quadratic has one solution. If the discriminant is positive, the quadratic equation has two distinct solutions.


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Franklin is cooking a 3-pound turkey breast for 6 people. How many pounds of turkey will be needed for 8 people
Bezzdna [24]

Answer:

5 pounds of TuRkEy BrEaSt

Step-by-step explanation:

8 0
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