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Papessa [141]
3 years ago
8

Can someone please help me ASAP :)

Mathematics
1 answer:
jeyben [28]3 years ago
4 0
Did this a couple years ago, im kinda lost xD . sorry
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A circle is divided into 4 sector in the ratio 4,3,1 and 2 .the circumference of the circle is 190cm.calculate
Natali5045456 [20]

Answer:

i. area of the circle = 2872.75 cm²

ii. length of the arc of the smaller sector = 19 cm

III. area of the smallest sector = 287.3 cm²

Step-by-step explanation:

The formula for calculating the circumference of any circle is 2*π*r

The formula for calculating the area of any circle is π*r²

1. "forget" all extra info and concentrate on the one important piece of info, which is circumference of the circle is 190cm. Use the right formula and calculate r.

2*π*r = 190

r = (190)/(2*π)

r = 30.2394391874601

r = 30,24 cm

2. Now use r in the other formula to calculate the total area of the circle in cm².

π* 30.2394391874601)² = 2872.75 cm²

3. Given there are 4 sector in the ratio 4,3,1,2. the total number of ratios is the sum of 4+3+1+2 = 10.

Wich means that 10 ratios account for the total area of the circle. and also for the the total circumference.

The smaller sector has the ratio of 1, which accounts for 1/10 arc of the total circomference:

1/10 *190 = 19 cm

4. The smaller sector has the ratio of 1, which accounts for 1/10 part of the total area:

1/10 * 2872.75 = 287.3 cm²

And that's all there is to it.

3 0
3 years ago
3 Coached Example
Natalija [7]
Since 8 is subtracted from z, add 5 to both sides.

z - 8 + 5 <span>≤ 5 + 8

z </span><span>≤ 13
</span>
Graph the solution set on the number line below.
(The Graph will be at the bottom of the page).

Since the symbol is <span>≤, draw a(n) less than circle or equal to circle at 13.
</span>
This shows that 13 is a solution.

Since all values less than 13 are also solutions, draw an arrow to the left. 

The solution set for the inequality is z <span>≤ 13, its graph is shown above.</span>

8 0
3 years ago
Alright well here goes another one
Andre45 [30]

Answer:

100 ft.

Step-by-step explanation:

multiply each side by 8 to get the measurement in feet, then add them all up.

(3.5x8)2+(5.5x8)

8 0
3 years ago
Read 2 more answers
What does x = if x multiplied by 7/3 = 1
ddd [48]

Answer:

Step-by-step explanation:

X×7/3 =1

X=3/7

5 0
3 years ago
A bacterium in a petri dish multiplies by a factor of 2 every day. On day O,
balu736 [363]

Answer:

1,000,000,000 divided by 2

Step-by-step explanation:

if each is being multiplied by two, dividing this by two is the inverse operation.

5 0
3 years ago
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