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2 years ago

Given that the diameter of Circle A is 6 cm , and the radius of Circle B is 18 cm , what can be concluded about the two circles?

Mathematics

1 answer:

ELEN [110]2 years ago

8 0

Answer:

The radius of circle B is 6 times greater than the radius of circle A

The area of circle B is 36 times greater than the area of circle A

Step-by-step explanation:

we have

<em>Circle A</em>

$D=6\ cm$

The radius of circle A is

$r=6/2=3\ cm$ -----> the radius is half the diameter

<em>Circle B</em>

$r=18\ cm$

Compare the radius of both circles

$3\ cm< 18\ cm$

$18=6(3)$

The radius of circle B is six times greater than the radius of circle A

Remember that , if two figures are similar, then the ratio of its areas is equal to the scale factor squared

All circles are similar

In this problem the scale factor is 6

$6^{2}=36$

therefore

The area of circle B is 36 times greater than the area of circle A

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All in standard Notation please :/ 2.09 x 10^5

Assoli18 [71]

9514 1404 393

Answer:

209,000
94,387
0.0013

Step-by-step explanation:

Write the power of ten in standard form and do the multiplication.

2.09 × 10^5 = 2.09 × 100,000 = 209,000

9.4387 × 10^4 = 9.4387 × 10,000 = 94,387

1.3 × 10^-3 = 1.3 × 0.001 = 0.0013

5 0

3 years ago

Joshua wants to buy a flat-screen TV that costs $625. He saves $62.50 each week to buy the TV. In how many weeks will he have en

MissTica

Answer:

<h2><u><em>C. 10 weeks</em></u></h2>

Step-by-step explanation:

Joshua wants to buy a flat-screen TV that costs $625. He saves $62.50 each week to buy the TV. In how many weeks will he have enough money to make his purchase?

A. 8

B. 9

C. 10

D. 11

cost of television divided by weekly savings = number of weeks

625 : 62.50 = 10 weeks

6 0

2 years ago

Can someone help me out please

alexgriva [62]

Honestly, I have no idea what it means by decomposition, but this is my best bet on what it means: Dividing the polygon into smaller, easier sections and solve for area and add them up.