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mel-nik [20]
2 years ago
13

A circle of 5 cm radius is drawn, and another circle 3 cm radius is drawn. What is the radius of a circle that has the same area

as the bigger one excluding the cut one?
(a) 2 cm
(b) 3 cm
(c) 4 cm
(d) 5 cm
Mathematics
1 answer:
wariber [46]2 years ago
8 0

Answer:

4 cm

Step-by-step explanation:

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When a number is increased by 5% the result is 25 what is the original number to the nearest 10th
lbvjy [14]
The original number to the nearest tenth is 23.8
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2 years ago
Ann wants to choose from two telephone plans. Plan A involves a fixed charge of $10 per month and call charges at $0.10 per minu
Kay [80]
Ann wants to choose from two telephone plans. Plan A involves a fixed charge of $10 per month and call charges at $0.10 per minute. Plan B involves a fixed charge of $15 per month and call charges at $0.08 per minute.

Plan A $10 + .10/minute

Plan B $15 + .08/minute

If 250 minutes are used:

Plan A: $10+$25=$35
Plan B: $15+$20=$35

If 400 minutes are used:

Plan A: $10+$40=$50
Plan B: $15+$32=$47

B is the correct answer. How to test it:

Plan A: $10+(.10*249 minutes)
$10+$24.9=$34.9

Plan B: $15+(.08*249 minutes)
$15+$19.92=$34.92

Plan A < Plan B if less than 250 minutes are used.
4 0
2 years ago
Select the correct answer. For what value of x is sin x = cos 19º, where 0°&lt; x &lt; 90°? OA. 38° ° O B. 71° OC. 26° O D. 19°​
Lerok [7]

Answer:

x = 71°

Option B is correct answer.

Step-by-step explanation:

We need to find for what value of x is sin\: x = cos 19^{\circ}, where 0°< x < 90°?

Solving:

sin\: x = cos\: 19^{\circ}\\Finding \:cos\: 19^{\circ}=0.94551\\Putting\:value:\\sin\:x=0.94551\\Now\:taking\:sin\:inverse\\x=sin^{-1}(0.94551)\\x=71^{\circ}

So, we get x = 71°

Option B is correct answer.

5 0
2 years ago
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aleksandrvk [35]

20/25 as a decimal is 0.8
4 0
3 years ago
Request edit access<br> 2. 7x + 4 = -3<br> How to solve
Gre4nikov [31]

Answer:

x= -1

Step-by-step explanation:

7x+4= -3 take -4 off both sides> 7x= -7 now divide 7x/-7> x= -1

7 0
3 years ago
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