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3 years ago

8

What is pi and how invented it??

2 answers:

satela [25.4K]3 years ago

4 0

Answer:

Step-by-step explanation:

The Egyptians calculated the area of a circle by a formula that gave the approximate value of 3.1605 for π. The first calculation of π was done by Archimedes of Syracuse (287–212 BC), one of the greatest mathematicians of the ancient world.

Vilka [71]3 years ago

3 0

Answer:

π is a mathematical constant. Its commonly used value is 3.14. There is a expanded value for π. It appears in many formulas in all areas of mathematics and physics. In maths, it is commonly used for solving of circles and spheres.

The π was invented by Archimedes of Syracuse. He was one of the greatest mathematicians of the ancient world.

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Please help!!<br><br> Which system of inequalities is represented by the graph?

kifflom [539]

Answer:

The third option

y < -2x +2

y < or = 1/2x -1

y > or = -4

Step-by-step explanation:

Solved on Desmos graphing calculator ;)

6 0

3 years ago

the sum of three numbers is 106. the first number is 6 less than the second. the third is 2 times the first

Tems11 [23]

Answer: 31/25/50

Explanation: 31 is the second one. 6 less than second is 25 which is the first one, and third is 2x the first so 50

50 + 25 + 31 = 106

4 0

3 years ago

I have to make the equation equal but I don’t know how to make the H equal but you can’t change the chemical formula

Firdavs [7]

Answer:

Ca(OH)2 + 2 HBr = CaBr2 + 2 H2O

Step-by-step explanation:

Is it H2O2 on the right side and HBr2 on the left side?

Then there is no solution.

I think the formula must look like

Ca(OH)2 + HBr = CaBr2 + H2O

You have 2 Br on the right side then it must be 2 HBr on the left side.

Ca(OH)2 + 2 HBr = CaBr2 + H2O

You have 4 Hs and 2 Os on the left side then it must be 2 H2O on the right side.

Ca(OH)2 + 2 HBr = CaBr2 + 2 H2O

Now everything looks fine.

4 0

3 years ago

An eagle perched 40 ft up in a tree looks down at a 35 degree angle(angle of depression) and spots a vole. How far is the vole f

maria [59]

Answer:

$X=49ft$

Step-by-step explanation:

From the question we are told that:

Height of Eagle $h=40ft$

Angle of depression $\theta=35\textdegree$

Generally the trigonometry equation for diagonal X is mathematically given by

$Cos\theta \textdegree=\frac{Adjacent}{Hypotenuse} }$

$Cos\theta \textdegree=\frac{h}{X} }$

$X=\frac{40}{Cos 35 } }$

$X=48.83ft$

$X=49ft$

3 0

3 years ago

Find the measure of 21. Justify your answer.<br> 75°<br> 2<br> 1<br> m

disa [49]

Answer:

∠ 1 = 75°

Step-by-step explanation:

∠ 1 and 75° are corresponding angles and are congruent , then

∠ 1 = 75°

8 0

2 years ago