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Aleksandr [31]
3 years ago
13

Score data from a statewide exam for 10th-graders follows a normal distribution, has a mean of 77, and has a standard deviation

of 6.5.
According to the Empirical Rule, 34% of test scores fall into what range? Select all that apply.

Below 70.5

Below 70.5 and above 83.5

Between 70.5 and 77

Below 77

Between 77 and 83.5

Above 77

Above 83.5
Mathematics
1 answer:
Oduvanchick [21]3 years ago
6 0

Answer:

Below 70.5 because of the 68, 95, and 97.5 rule

Step-by-step explanation:

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Find the area A of the sector of a circle of radius 50 feet formed by the central angle
kozerog [31]

Answer:

A=6250\ feet^2

Step-by-step explanation:

Given that,

The radius of circle, r = 50 feet

The central angle, \theta=5\ radian

We need to find the area of the sector of a circle. The formula for the area of sector is given by :

A=\dfrac{1}{2}r^2\theta\\\\=\dfrac{1}{2}\times 50^2\times 5\\\\A=6250\ feet^2

So, the area f the sector of the circle is 6250\ feet^2.

7 0
3 years ago
Which graph shows a dilation?
Ostrovityanka [42]

Answer:

A

Step-by-step explanation:

Dialation means to get smaller but it has to stay the same shape and measurements tho.

3 0
2 years ago
A study was done on several dogs that recently had litters of puppies. The results are shown below.
Reil [10]
Answer: 1/5
Explanation: 8/40 simplified in half is 4/20 then 2/10 then 1/5!
8 0
3 years ago
Read 2 more answers
Convert to the product of multiplication<br>a^2-b^2-4b-4
kirill [66]

a^2-b^2-4b-4 in form of multiplication is  (a-b)(a+b)-4(b+1) .

<u>Step-by-step explanation:</u>

We know that factors are the numbers that are being multiplied together . As 6532*7 = 45724 .Here 6532 & 7 are the factors and 45724 is product of the factors .

Here , we need to convert to the product of multiplication

a^2-b^2-4b-4 or , a^2-b^2-4b-4 :

⇒  a^2-b^2-4b-4

We know by identity that , p^2-q^2 = (p-q)(p+q)

⇒  (a-b)(a+b)-4b-4

Taking common term out as -4 :

⇒  (a-b)(a+b)-4(b+1)

Therefore  , a^2-b^2-4b-4 in form of multiplication is  (a-b)(a+b)-4(b+1) .

7 0
2 years ago
A train travels 250 miles at a constant speed (x), in miles per hour.Enter an equation that can be used to find the speed of the
Nastasia [14]
The first thing we must do for this case is to take into account the following variable:
 x = speed in miles per hour
 Then, by definition we have to:
 d = v * t
 Where,
 d: distance
 v: speed
 t: time
 Substituting values:
 250 = x * 5
 Answer:
 
An equation that can be used to find the speed of the train is:
 
250 = x * 5
6 0
3 years ago
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