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spayn [35]
3 years ago
8

The approximate land surface of the earth totals more than ________ square kilometers (square miles). the approximate land surfa

ce of the earth totals more than ________ square kilometers (square miles). 15 thousand (5,791) 1.5 billion (50,791,000,000) 15 trillion (50,791,000,000,000) 150 million (50,791,000) 1.5 thousand (579)
Mathematics
1 answer:
lakkis [162]3 years ago
4 0
The total land surface area of Earth is about 57,308,738 square miles, of which about 33% is desert and about 24% is mountainous. Subtracting this uninhabitable 57% (32,665,981 mi2) from the total land area leaves 24,642,757 square miles or 15.77 billion acres of habitable land
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What’s the area and the perimeter and of the triangle?
asambeis [7]

Answer:

Area = 3.3998

Perimeter = 2.9

Step-by-step explanation:

A method for calculating the area of a triangle when you know the lengths of all three sides.

Let a,b,c be the lengths of the sides of a triangle. The area is given by:

Area =  √  p  ( p − a )  ( p − b )  ( p − c )    

where p is half the perimeter, or  

a + b + c / 2

 p = 1.7 + 1.7 + 2.4 / 2 = 5.8 /  2 = 2.9

a = Area = 3.3998

Heron was one of the great mathematicians of antiquity and came up with this formula sometime in the first century BC, although it may have been known earlier. He also extended it to the area of quadrilaterals and higher-order polygons.

8 0
2 years ago
√m/3=4<br> My teacher didn't explain how to solve these to well can someone explain?
Andrews [41]
√m/3 = 4

To remove the radical sign, square both sides.

(√m/3)² = 4²
m/3 = 16

To remove the denominator of 3, multiply both sides by 3.
3 (m/3) = 3(16)
m = 48

To check: Substitute m by its value.
√m/3 = 4
√48/3 = 4
√16 = 4
4 = 4
4 0
3 years ago
Keisha wants to read for 90 minutes.so far , she has read 30% of her goal. how much longer does she need to reach her goal?
S_A_V [24]
30% of 90            <em>whenever it says "of" put in a multiplication sign </em>
30% x 90             <em> take out the % sign (percent means divided by 100)</em>
30/100 =3/10               <em>simplify,then multiply by 90</em>
3/10 x 90 = 270/10         <em> simplify</em>
270 = 27     
90 - 27 = 63            <em>subtract 27 because it is the amount read so far from the total</em>
Keisha has to read 63 more minutes to reach her goal.
6 0
3 years ago
Read 2 more answers
Compare 5.87 and 5.087 which greatest
IceJOKER [234]

Answer:

5.87

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
PLEASE HELP ASAP!!!!!
Wittaler [7]

Answer:

sec(x)

Step-by-step explanation:

cos(x)+cos(x)tan^2(x)

Multiply cos(x) by 1:

cos(x)*1+cos(x)tan^2(x)

Factor out cos(x):

cos(x)(tan^2(x)+1)

Apply the pythagorean identity (tan^2(x)+1=sec^2(x)):

cos(x)sec^2(x)

Rewrite sec^2(x):

cos(x)(\frac{1}{cos(x)})^2 \\cos(x)\frac{1}{cos^2(x)}

Cancel cos(x):

\frac{1}{cos(x)}

Rewrite:

sec(x)

5 0
4 years ago
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