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3 years ago

Find the area of the shape shown below.

Mathematics

2 answers:

crimeas [40]3 years ago

7 0

Answer:

42.5

Step-by-step explanation:

Cut this up and the rectangle at the top has an area of 9*3.5 = 31.5. The triangle in the bottom left corner has an area of 2, the square has an area of 4 and the bottom right triangle has an area of 5.

Add these values up to get 42.5

Mamont248 [21]3 years ago

4 0

Answer:

Step-by-step explanation:

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What does Arc CDE describe? a minor Arc a major Arc a semicircle a chord

jolli1 [7]

Answer:

I believe it's major arc

Step-by-step explanation:

Second option on edge

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3 years ago

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AABC has vertices A(-4, 4), B(-1,2), and C(-4,1). What are the coordinates of

steposvetlana [31]

Answer:

(1, - 3 )

Step-by-step explanation:

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3 years ago

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Softa [21]

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83.16

Step-by-step explanation:

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3 years ago

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At 8am the temperature was 56°F by noon a storm had arrived and the temperature was 43°F which describes the change in the tempe

GaryK [48]

Answer:

b. -13

Step-by-step explanation:

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4 years ago

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9.4 The heights of a random sample of 50 college stu- dents showed a mean of 174.5 centimeters and a stan- dard deviation of 6.9

gladu [14]

Answer: a) (176.76,172.24), b) 0.976.

Step-by-step explanation:

Since we have given that

Mean height = 174.5 cm

Standard deviation = 6.9 cm

n = 50

we need to find the 98% confidence interval.

So, z = 2.326

(a) Construct a 98% confidence interval for the mean height of all college students.

$x\pm z\times \dfrac{\sigma}{\sqrt{n}}\\\\=(174.5\pm 2.326\times \dfrac{6.9}{\sqrt{50}})\\\\=(174.5+2.26,174.5-2.26)\\\\=(176.76,172.24)$

(b) What can we assert with 98% confidence about the possible size of our error if we estimate the mean height of all college students to be 174.5 centime- ters?

Error would be

$\dfrac{\sigma}{\sqrt{n}}\\\\=\dfrac{6.9}{\sqrt{50}}\\\\=0.976$

Hence, a) (176.76,172.24), b) 0.976.

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3 years ago