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3 years ago

Identify each statement that is both biconditional and true.

Mathematics

2 answers:

Kryger [21]3 years ago

5 0

Answer:

I think it's A and D

guajiro [1.7K]3 years ago

3 0

It’s gotta be A and D

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What is the area of the patio floor shown?

Oliga [24]

Answer:450ft2

Step-by-step explanation:

4 0

3 years ago

The population standard deviation for the heights of dogs, in inches, in a city is 3.4 inches. If we want to be 90% confident th

scoray [572]

Answer:

The minimize size that can be taken is - 31.28 or 31 .

Step-by-step explanation:

Lets calculate -

Population standard deviation, $\sigma=3.4 inches$

Margin of error, E = 1

Critical value , $z_0_._0_5 =1.645$

Now , the size of the sample , $n=(\frac{z\times \sigma}{E} )^2$

Putting the given values ,

$=(\frac{1.645\times 3.4}{1})^2$

= 31.28 or 31 .

The given table of the question has been attached here .

<u>Hence , the answer is 31.</u>

4 0

3 years ago

A survey of 140 freshmen business students at a local university produced the results listed below. How many students took only

Hunter-Best [27]

15

A total of 39 took psychology. 12 of those took that and science and another 10 of those took that and history. 2 people took all three. 12+10+2 = 24 students who took psychology along with another class. To find the number of students who took ONLY psychology, you would take 39 and subtract 24, which leaves you with 15.

8 0

2 years ago

A circle with area \blue{25\pi}25πstart color #6495ed, 25, pi, end color #6495ed has a sector with a central angle of \purple{\d

vredina [299]

Answer:

Step-by-step explanation:

Given that

The area of circle is 25π square unit

Area = 25π square unit

The area of a circle can be calculated using

Area = πr²

Where r is radius of the circle

Then, let find the radius of the circle

Area = πr²

25π = πr²

Divided Both side by π

25π / π = πr² / π

25 = r²

Take square root of both sides

√25 = √r²

5 = r

Then, the radius of the circle is 5 unit

Then, given that the angle subtended by the sector is 9π/10 rad

θ = 9π/10 rad

Then, we want to find the area of the sector

Area of a sector is calculated using

Area of sector = (θ / 360) × πr²

Area of sector = θ × πr² / 360

The formula is in degree let convert to radian

360° = 2π rad.

Then,

Area of sector = θ × πr² / 2π rad

Then,

Area of sector = θ × r² / 2

Area of sector = ½ θ•r²

Then, Area of the sector is

A = ½ θ•r²

A = ½ × (9π / 10) × 5²

A = (9π × 5²) / (2 × 10)

A = 225π / 20

A = 45π / 4

A = 11.25π Square unit

A = 35.34 square unit

3 0

3 years ago

I WILL GIVE BRAINLIEST TO WHOEVER ANSWERS

vovikov84 [41]

Answer:

it's C.

Step-by-step explanation:

Hope that helped :D

6 0

3 years ago