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balandron [24]
3 years ago
13

A circular swimming pool is 21 feet in diameter. What is the circumference of the swimming pool?

Mathematics
1 answer:
Natasha2012 [34]3 years ago
5 0
Circumference= 2 x pi x r
C= 2 x pi x (21/2)
C=21 x pi
C=65.97 ft

Hope this helps :)
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What is f(g(x)) if f(x)= 4x²+3x-4 and g(x)=2x​
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Answer:

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Step-by-step explanation:

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f(g(x))=16x^2+6x-4

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Answer the Blanks:
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Answer:

1. 90°

2. 90°

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4. 45°

5. 45°

Step-by-step explanation:

<u>Given:</u> ΔABC,

CD⊥AB,

m∠A=50°,

m∠ACB=85°

<u>Solution:</u>

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m\angle ADC=90^{\circ}

2. ∠CDB is a right ange, because CD⊥AB, so

m\angle CDB=90^{\circ}

3. Consider triangle ACD. The sum of the measures of all interior angles is always 180°, so

m\angle A+m\angle ADC+m\angle ACD=180^{\circ}\\ \\50^{\circ}+90^{\circ}+m\angle ACD=180^{\circ}\\ \\m\angle ACD=180^{\circ}-50^{\circ}-90^{\circ}=40^{\circ}

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m\angle A+m\angle ACB+m\angle B=180^{\circ}\\ \\50^{\circ}+85^{\circ}+m\angle B=180^{\circ}\\ \\m\angle B=180^{\circ}-50^{\circ}-85^{\circ}=45^{\circ}

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Answer:

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Step-by-step explanation:

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