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3 years ago

Ruby wants to estimate the height of a streetlamp post on her block. She stands a certain

Mathematics

1 answer:

ira [324]3 years ago

6 0

Answer: The height of street would be 3.26 feet.

Step-by-step explanation:

Since we have given that

Angle of elevation = 71°

Distance traveled = 12 feet

Angle of elevation becomes 46°.

So, the height of the street lamp post would be

$h=\dfrac{d}{\cot 46^\circ-\cot 71^\circ}\\\\h=\dfrac{12}{0.965-0.344}\\\\h=\dfrac{12}{0.620}\\\\h=3.26\ feet$

Hence, the height of street would be 3.26 feet.

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9966 [12]

Answer:

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3 years ago

20. x= ML ABD = m2 DBC =

galben [10]

Answer:

The answer to your question is:

x = 18

m∠ABD = 36°

m∠DBC = 54°

Step-by-step explanation:

m∠ABD + m∠DBC = 90°

2x + 3x = 90°

5x = 90°

x = 90/5

x = 18

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m∠DBC = 3(18)

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4 years ago

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4 years ago

350 is 70% of what number A) 500 B) 420 C)245 D)280

cupoosta [38]

Answer:

Step-by-step explanation:

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3 years ago

Read 2 more answers

If f(x)=4x2=1 and g(x)=x2-5, find (f-g)(x) A:3x2+6 B:5x2-6 C:3x2-4 D:5x2-4

Alex787 [66]

For this case we have the following functions:

$f (x) = 4x ^ 2 + 1\\g (x) = x ^ 2-5$

We must find $(f-g) (x):$

By definition of operations with functions we have:

$(f-g) (x) = f (x) -g (x)$

So:

$(f-g) (x) = f (x) -g (x) = 4x ^ 2 + 1- (x ^ 2-5) = 4x ^ 2 + 1-x ^ 2 + 5 = 3x ^ 2 + 6$

Answer:

Option A

$3x ^ 2 + 6$

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4 years ago