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Kipish [7]
3 years ago
12

Use a calculator to find the value of Sin 21°

Mathematics
2 answers:
VikaD [51]3 years ago
8 0

The answer is;

B. 03584
sveta [45]3 years ago
4 0

Answer:

Option B is the correct answer.

Step-by-step explanation:

We need to find  the value of Sin 21° using calculator and round to four decimal places.

Using calculator

             Sin 21° = 0.358367949

Rounding the value of Sin 21° to four decimal places.

            Sin 21° = 0.3584

Option B is the correct answer.

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The point (4,-2) is the vertex of the graph of a quadratic function. The points (8,6) and (2,0) also fall on the graph of the fu
Elina [12.6K]

Answer:

Step-by-step explanation:

y = ax² + bx + c

~~~~~~~

(4, - 2), (8, 6), (2, 0)

a(4²) + b(4) + c = - 2

a(8²) + b(8) + c = 6

a(2²) + b(2) + c = 0

16a + 4b + c = - 2 .............. <em>(1)</em>

64a + 8b + c = 6 ............... <em>(2)</em>

4a + 2b + c = 0 ................. <em>(3)</em>

a = 0.5 ; b = - 4 ; c = 6

<em>y = 0.5x² - 4x + 6</em>

Part A: (0, 6), (6, 0)

Part B: (0,6)

Part C: (6, 0)

Part D: [ 4, ∞ )

4 0
3 years ago
The scale of a model train is 1 inch to 13.5 ft. One of the cars of the model train is 5inches long. What is the length in feet
aleksklad [387]

Answer:

The length of the actual train's car is <u>67.5 feet.</u>

Step-by-step explanation:

Given:

The scale of a model train is 1 inch to 13.5 ft.

Now, to get the length of the actual car of the train.

Let the length of actual train's car be x.

And, the length of the car of model train = 5\ inches\ long.

<em>According to the scale of the model train, 1 inch is equivalent to 13.5 ft. </em>

<em>Thus, 5 inches is equivalent to </em>x.<em />

Now, to get the length of actual train's car using cross multiplication method:

\frac{1}{13.5} =\frac{5}{x}

By cross multiplying we get:

x=67.5\ feet.

Therefore, the length of the actual train's car is 67.5 feet.

7 0
3 years ago
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Yuri [45]
The answer should be X= 88/3 or x= 29 1/3
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2 years ago
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The price of an item has been reduced by 60% the original price was $20 what is the price of the item now
tester [92]

Answer:

6

Step-by-step explanation:

20 times 0.3 is 6

3 0
2 years ago
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Five times a number is 120, what is the number
Mandarinka [93]
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