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2 years ago

What is the answer to 0.7 × 9

Mathematics

2 answers:

EastWind [94]2 years ago

8 0

Answer:

6.3

Step-by-step explanation:

Because you use a cacluator.

blondinia [14]2 years ago

6 0

Answer:

$\boxed{6,3}$

Step-by-step explanation:

$0,7 \times 9$

$= \frac{7}{10} \times 9$

$= \frac{63}{10}$

$= 6,3$

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torisob [31]

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Step-by-step explanation:

We are given that

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$\frac{dy}{dx}=12x+14$

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Using the formula

Length of curve= $s=\int_{-2}^{1}\sqrt{1+(12x+14)^2}dx$

Using substitution method

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$dt=12dx$

$dx=\frac{1}{12}dt$

Length of curve= $s=\frac{1}{12}\int_{-2}^{1}\sqrt{1+t^2}dt$

We know that

$\sqrt{x^2+a^2}dx=\frac{x\sqrt {x^2+a^2}}{2}+\frac{1}{2}\ln(x+\sqrt {x^2+a^2})+C$

By using the formula

Length of curve= $s=\frac{1}{12}[\frac{t}{2}\sqrt{1+t^2}+\frac{1}{2}ln(t+\sqrt{1+t^2})]^{1}_{-2}$

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Length of curve= $s=\frac{1}{12}(\frac{(12+14)\sqrt{1+(26)^2}}{2}+\frac{1}{2}ln(26+\sqrt{1+(26)^2})-\frac{12(-2)+14}{2}\sqrt{1+(-10)^2}-\frac{1}{2}ln(-10+\sqrt{1+(-10)^2})$

Length of curve= $s=\frac{1}{12}(13\sqrt{677}+\frac{1}{2}ln(26+\sqrt{677})+5\sqrt{101}-\frac{1}{2}ln(-10+\sqrt{101})$

Length of curve= $s=32.66$

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What is the answer to 0.7 × 9​

What is the answer to 0.7 × 9