Answer:
2229 thanks, merry early Christmas
Answer:
History of mathematics
Several civilizations — in China, India, Egypt, Central America and Mesopotamia — contributed to mathematics as we know it today. The Sumerians were the first people to develop a counting system. Mathematicians developed arithmetic, which includes basic operations, multiplication, fractions and square roots. The Sumerians’ system passed through the Akkadian Empire to the Babylonians around 300 B.C. Six hundred years later, in America, the Mayans developed elaborate calendar systems and were skilled astronomers. About this time, the concept of zero was developed.
Step-by-step explanation:which includes basic operations, multiplication, fractions and square roots. The Sumerians’ system passed through the Akkadian Empire to the Babylonians around 300 B.C. Six hundred years later, in America, the Mayans developed elaborate calendar systems and were skilled astronomers. About this time, the concept of zero was developed.
Answer:
25.2 minutes
Step-by-step explanation:
step 1
Find the area of the given wall
![A=(7)(6)=42\ ft^2](https://tex.z-dn.net/?f=A%3D%287%29%286%29%3D42%5C%20ft%5E2)
step 2
we know that
You can paint 75 square feet of a surface every 45 minutes
so
using proportion
Find out how long it takes you to paint a surface area of 42 square feet
![\frac{75}{45}\ \frac{ft^2}{min}=\frac{42}{x}\ \frac{ft^2}{min}\\\\x=45(42)/75\\\\x=25.2\ min](https://tex.z-dn.net/?f=%5Cfrac%7B75%7D%7B45%7D%5C%20%5Cfrac%7Bft%5E2%7D%7Bmin%7D%3D%5Cfrac%7B42%7D%7Bx%7D%5C%20%5Cfrac%7Bft%5E2%7D%7Bmin%7D%5C%5C%5C%5Cx%3D45%2842%29%2F75%5C%5C%5C%5Cx%3D25.2%5C%20min)
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