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ValentinkaMS [17]
3 years ago
9

How do I find the value of sec pi/12?

Mathematics
1 answer:
scoray [572]3 years ago
6 0
Sec x =  1/Cosx

Pi radians = 180 degress

Pi/12 = 180/12 = 15 degrees.

Sec15° = 1/Cos15°

Sec pi/12 = Sec 15° = 1/Cos 15°

Cos 15° = 0.9659  using a calculator.

Sec pi/12 = Sec 15° = 1/Cos 15° = 1/0.9659 = 1.0353

Sec Pi/12 = 1.0353
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For the first die, 5 out of 6 are not 1. 
That is 5/6. 
For the second die, 3 out of 4 are not 1. 
That is 3/4.  
Multiply 5/6 by 3/4 to get the probability.
5/6 x 3/4 = 20/72 
Simplify once to get 10/36. 
Do it again to get 5/18. 
In decimal form it is 0.2777 and in percent form it is 27.77%. 
Hope this helps!

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8 0
3 years ago
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The aquarium charges an entrance fee of $5 per child and $12 per adult. On one day, 100 people visited the aquarium. They collec
igor_vitrenko [27]

Answer:

We set up 2 equations

A) C + A = 100

B) 5C + 12A = 780

We multiply A by -5

A) -5C -5A = -500   then we add B

B) 5C + 12A = 780

7A = 280

Number of Adults = 40

5C = 780 - 40*12

5C = 780 -480

5C = 300

Number of Children = 60

Step-by-step explanation:

6 0
3 years ago
A cook has 2 3/4 pounds of ground beef. How many quarter-pound burgers can he make?
kherson [118]

9514 1404 393

Answer:

  11

Step-by-step explanation:

2 3/4 lb = 11/4 lb = 11×(1/4 lb)

The cook can make 11 quarter-pound burgers.

3 0
3 years ago
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iogann1982 [59]

Answer: 4

Step-by-step explanation:

u+3=7

u=7-3

u=4

3 0
3 years ago
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