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Trava [24]
3 years ago
5

The following three shapes are based only on squares, semicircles, and quarter circles. Find the perimeter and the area of each

shaded part. Give your answer as a completely simplified exact value in terms of π (no approximations).

Mathematics
1 answer:
USPshnik [31]3 years ago
3 0

Answer:

  (81 -20.25π) cm²

Step-by-step explanation:

The area of the 9 cm square is ...

  (9 cm)² = 81 cm²

The area of the 9 cm circle is ...

  (π/4)(9 cm)² = 20.25π cm²

The blue shaded region is the difference of these areas, so is ...

  shaded area = (81 -20.25π) cm²

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A cinema has 3 screens.last saturday there were 500 visitors
mafiozo [28]

Answer:

200 screen 1

125 screen 2

175 screen 3

Distribution of 500 visitors =100% attendees.

We remove a zero to find 1/10th. By converting  500 }  50/10   =  10 x 50

Step-by-step explanation:

when you add up; 40/10 +  25/10 = 4.0 + 2.5

and show 7.5 is the same as  a + b + 1 x 100

and above 7.5  = 175/100 = 1 .75

Or use the counter  x = multiply by 50

40/10 + 25/10 = 6.5

6.5-10 = 3.5

        x =3.5 x 50

For this last one we can pose new question where 300 visitors was the original total then create new data for new question.

where x = multiply by 30 and create all to tenths etc.

We subtract the shown tenths only to find the total

Then same will apply above with new data.

5 0
3 years ago
Can anyone help me please? i have 14 more minutes to finish this can anyone help?
valentinak56 [21]

Answer:

B

Step-by-step explanation:

A is 3-2 which is 1, not 5.

C is 3(2), which is 6, not 5.

D is 6, which is not 5.

-hope it helps

5 0
2 years ago
Read 2 more answers
Is this correct or no if not what the answer
trapecia [35]

Answer:

A.

While D is partially correct, A is the way to go, because samples are easier to collect than whole populations. The internet quotes, "It is a much quicker process and is more time efficient." This proves the theory why A is the correct answer.

6 0
2 years ago
Find the area of the trapezoid. Pls explain and I will mark brainliest.
timama [110]

Answer:

  • B. 191.4 m²

Step-by-step explanation:

Split the trapezoid as pictured below

Find its height and the upper base, then find the area of the trapezoid.

There are 3 pieces, two of them are 45°×45° and 30°×60°×90° triangles

  • The ratio of sides of a 30°×60°×90° triangle is  1 : √3 : 2
  • The legs of a 45x45 triangle are equal

<u>The above mentioned properties give us:</u>

  • h = 16/2 = 8 m
  • b = 8√3 ≈ 13.85 m
  • a = h = 8 m

<u>Now find the area:</u>

  • A = 1/2( 13 + 8 + 13.85 + 13)*8 = 191.4 m²

Correct choice is B

8 0
2 years ago
In the diagram below of circle , diameter AB is parallel to chord CD. A. 110° B. 70° D C. 55° h D. 35° A B If mCD = 70, what is
UkoKoshka [18]

Answer:

55

Step-by-step explanation:

here's the working out i did

5 0
2 years ago
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