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Nostrana [21]
3 years ago
7

What is the arc length if θ = 2 pi over 7 and the radius is 3 cm?

Mathematics
2 answers:
denis-greek [22]3 years ago
5 0
Arc length = <span>θ/2pi * 2pi * r = </span><span>θ * r = 2pi/7 * 3 = 6pi/7 = 2.69 cm</span>
laiz [17]3 years ago
5 0

Answer:

Length of the arc will be 2.69 cm.

Step-by-step explanation:

We have to calculate the length of an arc if θ = \frac{2\pi }{7} and radius of arc is 3 cm.

As we know length of an arc = r × θ

By putting the values of angle θ and radius of arc r in the formula

m (arc) =  \frac{2\pi }{7} × 3

           =  \frac{6\pi }{7}

           =  \frac{6(3.14)}{7}

           = 2.69 cm

Therefore, length of the arc will be 2.69 cm.

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What is equivalent to 3 to the negative 2nd power
VladimirAG [237]
3 to the negative second power is written like this: 3^{-2}. 

When simplifying an expression with a negative exponent, you take a positive version of the exponent, in this case that would be 2, and apply that to the base. 
After doing that, we have 9. 
The next step is to put one over that number.
In this case, now after doing that the answer is \frac{1}{9}. 

Hope this helps!
6 0
3 years ago
2. Kelsea needs a test average of at least 90 to get an "A-" this marking period in math. Her three test grades
Luda [366]

Answer:

<u>Equation:  87 + 91 + 86 + x = 360</u>

<u>Solution: 264 + x = 360</u>

<u>x = 360 - 264</u>

<u>x = 96</u>

Step-by-step explanation:

1. Let's review the information given to us to answer the question correctly:

First three Kelsea's test grades : 87, 91 and 86

2. What score must she get on her fourth test to receive at least an A- ?

Define variable:  x that represents the grade needed by Kelsea on her fourth test to receive at least an A-

Equation:  87 + 91 + 86 + x = 360

Solution: 264 + x = 360

x = 360 - 264

x = 96

<u>Now you can understand if the previous work you did is correct</u>

6 0
4 years ago
Diego has purchased a $159,000 home with a 30-year mortgage at 5.05%. He can make a monthly payment of $1,300. If he were to mak
Gemiola [76]

Answer: 173 months MY GUY!

Step-by-step explanation:

3 0
3 years ago
Calculate the volume of a cuboid with length 5.6m breadth 4.1m, height 3.4m
lidiya [134]

Answer:  78.064 cubic meter

Step-by-step explanation:

volume of a cuboid=length × breadth × height.

                                =5.6*4.1*3.4

                                =78.064 cubic meter

6 0
3 years ago
Help please!! percentages thank you!!
Zanzabum

Answer:

1)

16=25%

x=100%

25x=1600

x=64

2)

6300/1260 * 100 = 20

100 - 20 = 80%

3)

Total: 40

Set desingers: 16

16/40 =  40%

4)

500*22%=110

500-110=390

Hope this helped you! I would appreciate a Brainliest, if this answer helped you out!

7 0
2 years ago
Read 2 more answers
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