It says to rounds each number to the place of the underlined digit

Mathematics

2 answers:

iragen [17]2 years ago

8 0

Answer:

it would be 905.260

Step-by-step explanation:

because the 5 next to the under lined number is more then 5 so you take all of it and add 1 to the under line number

Simora [160]2 years ago

8 0

Step-by-step explanation:

when the number is greater than 5 round it up, but if the number is less than 5 it stays the same.

answer: 8. 41.0 9. 0.4 12. 180.00 13. 905.300

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The circumference of the ellipse approximate. Which equation is the result of solving the formula of the circumference for b?

Serhud [2]

Answer:

$b = \sqrt{\frac{C^{2} }{2(\pi )^{2} } - a^{2}}$

Step-by-step explanation:

Given - The circumference of the ellipse approximated by $C = 2\pi \sqrt{\frac{a^{2} + b^{2} }{2} }$ where 2a and 2b are the lengths of 2 the axes of the ellipse.

To find - Which equation is the result of solving the formula of the circumference for b ?

Solution -

$C = 2\pi \sqrt{\frac{a^{2} + b^{2} }{2} }\\\frac{C}{2\pi } = \sqrt{\frac{a^{2} + b^{2} }{2} }$

Squaring Both sides, we get

$[\frac{C}{2\pi }]^{2} = [\sqrt{\frac{a^{2} + b^{2} }{2} }]^{2} \\\frac{C^{2} }{(2\pi)^{2} } = {\frac{a^{2} + b^{2} }{2} }\\2\frac{C^{2} }{4(\pi)^{2} } = {{a^{2} + b^{2} }$