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kondaur [170]
3 years ago
7

Earth has a surface area of approximately 197000000 square miles and a total land area of 58000000 square miles. What fraction o

f the earth surface is land? Write another fraction that is close to your answer and has a denominator.
Mathematics
1 answer:
Jet001 [13]3 years ago
3 0

We have been given that the surface area of the earth is approximately 197000000 square miles.

Also the land area of the earth is given by 58000000 square miles.

Therefore, the fraction of the earth surface is land is given by

\text{Required fraction }= \frac{\text{Land surafce area}}{\text{Total surface area}}\\ \\ \text{Required fraction }= \frac{58000000}{197000000}

On simplifying it, we get

\text{Required fraction }= \frac{58}{197}


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A circle is drawn within a square as shown. What is the best approximation for the area of the shaded region? Use 3.14 to approx
Angelina_Jolie [31]

Answer:

168.168 square inches

Step-by-step explanation:

Given data

From the question, we can deduce that the side of the square is 28in

Hence the area of the square is

Area= 28^2

Area= 784 square inches

Also, the diameter of the circle is 28 in

The radius = 14 in

Area of circle= πr^2

Area= 3.142*14^2

Area= 3.142* 196

Area= 615.832 square inches

Therefore the area of the shaded region is

= Area of Square - Area of Circle

= 784-615.832

=168.168 square inches

4 0
3 years ago
Which electron configuration represents the electrons of a sulfur atom in an excited state? Choice number 2 (1) 2-6-6 (3) 2-8-4
Archy [21]

Answer:

<em>(3) 2-8-4</em>

<em></em>

Step-by-step explanation:

Sulphur has an atomic number of 16

sulphur can exist in 3 different excited states of +2, +4 and +6

electronic configuration of sulphur is 2,8,6

when excited, <em>it loses 2 electrons to enter the +2 state</em>

in the +2 state, the electronic configuration will be <em>2,8,4</em>

8 0
3 years ago
Taber invested money in an account where interest is compounded every year. He made no withdrawals or deposits. The function A(t
ioda

Taber invested money in an account where interest is compounded every year. He made no withdrawals or deposits.

The function A(t) = 525(1 + 0.05)t represents the amount of money in the account after t years.

The function is explained as below

Amount = Principal * ( 1 + interest rate ) ^ time

Principal is the amount that is invested in the beginning

Therefore, Taber originally invested $525

3 0
3 years ago
13.) Springfield Elementary is putting on a school play
Oduvanchick [21]

45 adult tickets and 80 children tickets were sold

<em><u>Solution:</u></em>

Let "a" be the number of adult tickets sold

Let "c" be the number of children tickets sold

Cost of 1 adult ticket = $ 6

Cost of 1 children ticket = $ 3.50

<em><u>They sold a total of 125 tickets</u></em>

Therefore,

a + c = 125

c = 125 - a --------- eqn 1

<em><u>They made a total of $550. Therefore, frame a equation as:</u></em>

number of adult tickets sold x Cost of 1 adult ticket + number of children tickets sold x Cost of 1 children ticket = 550

a \times 6 + c \times 3.50 = 550\\

6a + 3.50c = 550 ----------- eqn 2

<em><u>Let us solve eqn 1 and eqn 2</u></em>

<em><u>Substitute eqn 1 in eqn 2</u></em>

6a + 3.50(125 - a) = 550

6a + 437.5 - 3.50a = 550

2.5a = 112.5

<h3>a = 45</h3>

<em><u>Substitute a = 45 in eqn 1</u></em>

c = 125 - 45

<h3>c = 80</h3>

Thus 45 adult tickets and 80 children tickets were sold

3 0
3 years ago
Log3 (x squared + 7x + 21) = 2
Nezavi [6.7K]

Step-by-step explanation:

log <base a> b = x

means

a^x = b

So

3^2 = x^2+7x+21

x^2 + 7x + 21 - 9 = 0

x^2 + 7x + 12 = 0

(x+3)(x+4)

x = -3 or -4

3 0
3 years ago
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