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solmaris [256]
3 years ago
14

Numbers expressed using exponents are called ?

Mathematics
1 answer:
Crazy boy [7]3 years ago
4 0
They are called powers
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The area of the regular pentagon is 6.9 cm2. What is the perimeter? 2 cm 5 cm 10 cm 20 cm
disa [49]

Given

Area of the regular pentagon is 6.9 cm².

Find out the perimeter of a regular pentagon

To proof

Formula

Area of regular pentagon is

= \frac{1}{4}\sqrt{5(5+2\sqrt{5})}\ a^{2}

As given in the question

area of regular pentagon = 6.9 cm²

now equating the area value with the area formula.

6.9 =\frac{1}{4}\sqrt{5(5+2\sqrt{5})} a^{2}

Now put

√5 = 2.24 ( approx)

put in the above equation

\frac{6.9\times 4}{\sqrt{5(5+2\times2.24)}}=a^{2}\\\frac{27.6}{\sqrt{47.4}}=a^{2}\\\frac{27.6}{6.88}=a^{2}

thus

a² = 4.01

a = √ 4.01

a = 2.0 cm ( approx)

As perimeter  represented the sum of all sides.

i.e regular pentagon have five sides of equal length.

Thus

perimeter of the regular pentagon = 5 × side length

                                                         = 5 ×2.00

therefore the perimeter of the regular pentagon = 10cm

option c is correct

Hence proved









3 0
3 years ago
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Find the terminal point P(x,y) on the unit circle determined by the given value of t=4pi/3. Please enter your answer as an order
Crazy boy [7]
So in your circle their is a terminal point who is assigned by the value of  P(x,y) and lies or determined by teh value of T=4pi/3. To get the coordinates of this terminal point first is to know what is the angle of the T and the answer is (-1/2, -sqrt(3)/2)
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3 years ago
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Beckys mother has three daughters. She named them penny and Nichole. What did she name the third daughter
faltersainse [42]
Becky is the answer. for 1000 pnts

3 0
3 years ago
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Question 1: Select the property shown
valentinak56 [21]

Answer:

E BC itsay 3a 5b = 3.5 so it E

4 0
2 years ago
The ratio of a basketball player's completed free throws to attempted free throws is 4 to 7. If she completed 12 free throws, fi
Ghella [55]
The ratio of a basketball player's
completed free throws : attempted free throws
7 : 4

There are 12 free throws.
= 7 / 4 of 12
= 21 free throws.

If she completed 12 free throws, the number of free throws <span>she attempted is 21 free throws.</span>
3 0
3 years ago
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