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Natali [406]
3 years ago
13

Stuck on this one, can somebody help me

Mathematics
2 answers:
murzikaleks [220]3 years ago
4 0
If you try
Tan 1 = GH/ HI then tan 42° = 11/HI= 0.90
After HI=11/0.90
The it equal to approximately 12.22
melamori03 [73]3 years ago
3 0

Answer:

HI ≈ 12.22

Step-by-step explanation:

tan I = GH / HI

tan 42° = 11 / HI = 0.90

HI = 11/0.90 = 12.22

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The sum of a number squared and five
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Answer:

(x+5^3 is the answer of this question

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3 years ago
BRAINLIEST QUESTION
Debora [2.8K]

Answer:

the answer is triangles ABC and DEC are similar

Step-by-step explanation:

angle C is a common angle for both triangles

angle D is equal to angle A ( corresponding angles)since they are parallel

angle B is also equal to angle B for the same reason as angle D and A

since the three angles of the two angles are equal they are similar

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3 years ago
What is the formula to find the circumference of a circle and how do i do it?
Leni [432]

Answer:

circumference of a circle = 2*pi*radius

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3 0
3 years ago
A rectangular storage container with a lid is to have a volume of 2 m3. The length of its base is twice the width. Material for
Scilla [17]

Answer:

Dimensions are 2 m by 1 meter by 1 meter,

Minimum cost is $ 18.

Step-by-step explanation:

Let w be the width ( in meters ) of the container,

Since, the length is twice of the width,

So, length of the container = 2w,

Now, if h be the height of the container,

Volume = length × width × height

2 = 2w × w × h

1 = w² × h

\implies h=\frac{1}{w^2}

Since, the area of the base = l × w = 2w × w = 2w²,

Area of the lid = l × w = 2w²,

While the area of the sides = 2hw + 2hl

= 2h( w + l)

= 2\times \frac{1}{w^2}(w+2w)

=\frac{6w}{w^2}

=\frac{6}{w}  

Since, Material for the base costs $1 per m². Material for the sides and lid costs $2 per m²,

So, the total cost,

C(w) = 1\times 2w^2+2\times 2w^2 + 2\times \frac{6}{w}

=2w^2+4w^2+\frac{12}{w}

=6w^2+\frac{12}{w}

Differentiating with respect to w,

C'(w) = 12w -\frac{12}{w^2}

Again differentiating with respect to w,

C''(w) = 12 + \frac{24}{w^3}

For maxima or minima,

C'(w) = 0

\implies 12w -\frac{12}{w^2}=0

\implies 12w^3 - 12=0

w^3-1=0\implies w = 1

For w = 1, C''(w) = positive,

Hence, for width 1 m the cost is minimum,

Therefore, the minimum cost is C(1) = 6(1)²+12 = $ 18,

And, the dimension for which the cost is minimum is,

2 m by 1 meter by 1 meter.

7 0
3 years ago
Picture shows question
GalinKa [24]
All work is show in the picture below.

5 0
3 years ago
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