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Lesechka [4]
2 years ago
12

Can one of y’all help me with this pls

Mathematics
1 answer:
garri49 [273]2 years ago
5 0

Answer: B

Step-by-step explanation:

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Georgia built a model of the Empire State Building that is proportional to the actual building. The actual building is 187 feet
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\frac{x}{10ft}  =  \frac{187ft}{1454ft}  \\ (10 \times 187) \div 1454 =  \\ 1.2861072902 \\ or \\ 1.3ft \: wide
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3 years ago
11) 5(b - 1)<br> Solve it
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Answer:

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Step-by-step explanation:

5(b - 1)

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professor190 [17]

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Step-by-step explanation:

8 0
3 years ago
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Prove that:<br><br>cos20°cos40°cos80°=1/8​
Naya [18.7K]

Answer:

see explanation

Step-by-step explanation:

Using the double angle identity for sine

sin2x = 2sinxcosx

Consider left side

cos20°cos40°cos80°

= \frac{1}{2sin20} (2sin20°cos20°)cos40°cos80°

= \frac{1}{4sin20} (2sin40°cos40°)cos80°

= \frac{1}{4sin20} (sin80°cos80° )

= \frac{1}{8sin20} (2sin80°cos80° )

= \frac{1}{8sin20} . sin160°

= \frac{1}{8sin20} . sin(180 - 20)°

= \frac{1}{8sin20} . sin20°

= \frac{1}{8} = right side , thus proven

7 0
2 years ago
Read 2 more answers
The following polynomial is defined on the interval [-2, 2]:
Bess [88]

Answer:

Using Matlab code for Fourier series to calculate for the function, see the attached

Step-by-step explanation:

Go through the picture step by step.

6 0
3 years ago
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