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3 years ago

Work out your perimeter of a semicircle with raduis 3cm give your answer in terms of pie

Mathematics

2 answers:

Marrrta [24]3 years ago

8 0

Answer:

18.84 cm

Step-by-step explanation:

P = 2 × pi × r

= 2 × 3.14 × 3cm

= 6cm × 3.14

= 18.84 cm

Thepotemich [5.8K]3 years ago

7 0

Answer:

9/2 π

Step-by-step explanation:

$Perimeter = \frac{\pi r^2}{2} \\r = 3\:cm\\\\P = \frac{\pi \times 3^2}{2}\\ \\P = \frac{\pi \times 9}{2}\\ \\P = \frac{9 \pi}{2} \\\\P = \frac{9}{2} \pi$

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3 years ago

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3 years ago

27^x = 9^x − 4 Question 1 options: x = 8 x = 4 x = −4 x = −8

Mariulka [41]

Answer:

x = -8

Step-by-step explanation:

Given the equation:

$27^x=9^{x-4}$

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3 years ago