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Svetlanka [38]
3 years ago
6

Can someone help me and explain

Mathematics
2 answers:
zloy xaker [14]3 years ago
6 0

Answer:

20.56 in

Step-by-step explanation:

The perimeter is the length of the outside of the figure.

This consists of 2 semicircles and 2 straight parts of 4 in

The 2 semicircles can be thought of as 1 circle with circumference

C = 2πr ( r is the radius )

Here diameter = 4 so r = 4 ÷ 2 = 2, then

C = 2 × 3.14 × 2 = 4 × 3.14 = 12.56 in

Thus

perimeter = 12.56 + 4 + 4 = 12.56 + 8 = 20.56 in

choli [55]3 years ago
4 0
The first thing I did was to make a living room for the next ➡️ to a friend of the first time since the first place in the same manner as the most popular connection with the other hand, if and I am a big deal with a new one way or the other hand, I have been using it for as long as possible and I am sure a lot of the time and the rest of the world is going to have to get the most out of the box the first.
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A function y(t) satisfies the differential equation dy dt = y4 − 9y3 + 20y2. (a) What are the constant solutions of the equation
Darya [45]

Answer:

a) y = 0, y = 4 and y = 5

b) y ⊂ (- ∞, 0) ∪ (0, 4) ∪ (5, ∞)

c) y ⊂ (4,5)

Step-by-step explanation:

Data provided in the question:

function y(t) satisfies the differential equation:

\frac{dy}{dt} = y⁴ − 9y³ + 20y²

Now,

a) For constant solution

\frac{dy}{dt} = 0

or

y⁴ − 9y³ + 20y² = 0

or

y² (y² - 9y + 20 ) = 0

or

y²(y² -4y - 5y + 20) = 0

or

y²( y(y - 4) -5(y - 4)) = 0

or

y²(y - 4)(y - 5) = 0

therefore, solutions are

y = 0, y = 4 and y = 5

b) for   y increasing

\frac{dy}{dt} > 0

or

y²(y - 4)(y - 5) > 0

or

y²

y ⊂ (- ∞, 0) ∪ (0, 4) ∪ (5, ∞)

c) for   y decreasing

\frac{dy}{dt} < 0

or

y²(y - 4)(y - 5) > 0

or

y²

y ⊂ (4,5)

8 0
4 years ago
IF U CAN DO ALGEBRA PLZ HELP
Ksju [112]
The first one is the answer
4 0
4 years ago
12.5 is 25% of what number
Ksenya-84 [330]
12.5 is 25% of x
percent means parts out of 100
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mulitply both sides by 4
50=number

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matrenka [14]

Answer:

D. EF is longer than EG.

Step-by-step explanation:

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3 0
3 years ago
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