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bezimeni [28]
3 years ago
14

What is the sum f 1.57 and 6.88

Mathematics
2 answers:
pentagon [3]3 years ago
5 0
What is the sum of 1.57 and 6.88?

Ok, so lets work this out together!

Sum means add.

   6.88
+ 1.57

That would be: 

= 8.45

Hope i helped!
zhuklara [117]3 years ago
5 0
The answer is 8.45 using a calculator <span />
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Find the area of an octagon whose perimeter is 120 cm.
stira [4]

Answer:

The area of an octagon whose perimeter is 120 cm is 1086.4 cm^{2}

Step-by-step explanation:

An octagon is a polygon with eight sides. If the lengths of all the sides and the measurement of all the angles are equal, the octagon is called a regular octagon.

There is a predefined set of formulas for the calculation of perimeter, and area of a regular octagon.

The perimeter of an Octagon is given by

P=8a

and the area of an Octagon is given by

A=2a^{2}(1+\sqrt{2})

We know that the perimeter is 120 cm, solving for side length (a) in the perimeter formula we get

120=8a\\\frac{8a}{8}=\frac{120}{8}\\a=15

Now, we calculate the area

A=2a^{2}(1+\sqrt{2})\\A=2(15)^{2}(1+\sqrt{2})\\A=450\left(1+\sqrt{2}\right)\\A\approx 1086.4 \:cm^{2}

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3 years ago
Colin received a bonus check for 2,500$. He is going to deposit the money into his bank account that receives 5.5% simple intere
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True or False: A relation passing the horizontal line test is a function.
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True.

Step-by-step explanation:

Remember that the horizontal line test checks if a function is one-to-one. If a horizontal line passes through a graph more than once, the function has more than one x-value for at least one y-value.

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Jacob, when you multiply a whole number by a decimal you get a number smaller than the whole number you started off with.

Step-by-step explanation:


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