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3 years ago

Round the number to the nearest thousand 728,639

Mathematics

2 answers:

Sveta_85 [38]3 years ago

7 0

Answer:

729000

Step-by-step explanation:

The 8 is in the thousands place, so we look at the 6

6>5 so we have to round up. The 8 become a 9

728639 rounds to 729000

lawyer [7]3 years ago

5 0

Answer:

I think 729,000

Step-by-step explanation:

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In triangle $XYZ,$ $\angle Y = 45^\circ$ and $\angle Z = 60^\circ.$ If $XZ = 4,$ then what is $XY$?

GalinKa [24]

Answer:

$XY = 4.9$

Step-by-step explanation:

$\angle Y = 45^\circ$

$\angle Z = 60^\circ$

$XZ = 4$

Required

Determine the length of XY?

This question is supported with the attachment.

To solve for the length of XY, we make use of the sine law which states:

$\frac{sin\ A}{a} = \frac{sin\ B}{b} = \frac{sin\ C}{c}$

In this case:

$\frac{sin\ \angle Y}{XZ} = \frac{sin\ \angle Z}{XY} = \frac{sin\ X}{YZ}$

Substitute in, the following values:

$\angle Y = 45^\circ$

$\angle Z = 60^\circ$

$XZ = 4$

The expression becomes:

$\frac{sin\ 45}{4} = \frac{sin\ 60}{XY}$

Cross multiply

$XY * \sin\ 45 = 4 * \sin\ 60$

Make XY the subject

$\frac{XY * \sin\ 45}{\sin\ 45} = \frac{4 * \sin\ 60}{\sin\ 45}$

$XY = \frac{4 * \sin\ 60}{\sin\ 45}$

$XY = \frac{4 * 0.8660}{0.7071}$

$XY = \frac{3.4640}{0.7071}$

$XY = 4.89888276057$

$XY = 4.9$ --- approximated

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3 years ago

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Kobotan [32]

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borishaifa [10]

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3 years ago

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Oksi-84 [34.3K]

Answer:

Step-by-step explanation:

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3 years ago

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Step-by-step explanation:

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