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user100 [1]
3 years ago
10

Calculate the area of a circle with a radius of 2 cm and a circle with a radius of 4 cm. Leave your answers in terms of pi.

Mathematics
1 answer:
galina1969 [7]3 years ago
6 0
S = πr^<span>2
</span>so area of circle where r is 2cm;π=3,14 will be 
S = π*(2^2)
S=π*4
S=4π  cm2

S = πr^2
so circle  where r is 4cm;π=3,14 will be 
S = π*(4^2)
S=π*16
S=16π  cm2


the answer for second question is thet the area gets bigger 4 times if we double radius)so "yes"

ANSWER IS 
<span>C) 4π cm2; 16π cm2; YES </span>
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What is the common ratio of the geometric sequence below?<br><br> 625, 125, 25, 5, 1, ...
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4 1
3 years ago
Determine an expression that would represent the area of the figure shown.
Alborosie

Answer:

Option A : 15x² + 62x + 63 is the correct answer.

Step-by-step explanation:

Given measurements of the figure are:

5x + 9 and 3x + 7

We have to find the area. We can find the area by multiplying the two expressions.

Area = (5x+9) * (3x+7)

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8 0
3 years ago
Solving using inverse operation 83 + q = 125 q =
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Read 2 more answers
Identify the 12th term of the arithmetic sequence in which a7 = 40 and a18 = 106.
Lady_Fox [76]

we are given

airthematic sequence

we can use nth term formula

a_n=a_1+(n-1)d

n is number of terms

an is nth term

d is common difference

a1 is first term

We are given

a7=40

we can use it

a_7=a_1+(7-1)d

40=a_1+6d

a_1+6d=40

a18 = 106

a_1_8=a_1+(18-1)d

a_1+17d=106

we can subtract both equations

a_1+17d-a_1-6d=106-40

11d=66

d=6

now, we can find a1

a_1+6d=40

we can plug d=6

a_1+6*6=40

a_1=4

12th term:

a_1_2=a_1+(12-1)d

now, we can plug values

a_1_2=4+(12-1)*6

a_1_2=4+66

a_1_2=70

so, 12th term is 70...........Answer

3 0
3 years ago
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