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AlekseyPX
2 years ago
6

Help, and if you can give me a step by step explanation

Mathematics
1 answer:
Llana [10]2 years ago
5 0

Answer:

the first option

Step-by-step explanation:

variability !

what does that word tell us ?

it means that there are more individuals differences.

you could also use "accuracy" as the opposite - we are aiming for the mean value ...

imagine some bow and arrow tournament.

who wins ?

the person with the highest accuracy across all the attempts (and that means the lowest variability in the results across all attempts relatively to the target center representing the predefined mean value).

now look at the graphic for neighborhood A.

and then for neighborhood B.

which one has the data points more clustered around the center (where the mean value is going to be) ? this one has lower variability than the one where the data points are having more than one cluster or are even all over the place.

remember, for the variability you have to add all the differences to the mean value. the smaller the differences to the mean value, the smaller the variability.

in neighborhood B almost all data points have a larger difference to the mean value.

so, the variability will be higher here.

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Jana hit a golf ball with an initial velocity of 102 ft per second at an angle of 67 degrees with the horizontal. After 2 second
Romashka-Z-Leto [24]
Horizontal distance x(t) = ut cos θ
x(2) = 102 * 2 * cos 67 = 79.7 ft.

Vertical distance y(t) = ut sin θ - 1/2 gt^2
y(3) = 102 * 2 * sin 67 - 1/2 * 9.8 * (3)^2 = 187.78 - 44.1 = 143.7 ft.
6 0
3 years ago
7,500 is 35% of what?
earnstyle [38]

Answer:

21428.57

Step-by-step explanation:

Steps to solve "7500 is 35 percent of what number?" We have, 35% × x = 7500 or, 35 100 × x = 7500 Multiplying both sides by 100 and dividing both sides by 35, we have x = 7500 × 100 35 x = 21428.57 If you are using a calculator, simply enter 7500×100÷35, which will give you the answer.

6 0
4 years ago
Read 2 more answers
An elevator went up 15 floors, down 9 floors, up 11 floors and down 19 floors. Find the net change
Slav-nsk [51]
15u + 11u - 9d - 19d = -2d
It went up 26, down 28, a net change of down 2.
3 0
3 years ago
Read 2 more answers
The length of a rectangular field is 6 metres longer than its width. If the area of the field is 72 square metres, What are the
Mnenie [13.5K]

Answer:

The length is 12metres, the width is 6metres

Step-by-step explanation:

Suppose the width is x, the length is x+6

The square is 72. The square of rectangular field is equal to product of length and width.

so x(x+6)=72

x^2+6x-72=0

a=1 b=6 c=-72

D= b^2-4ac= 6*6+288= 36+288= 324

sqrtD= 18

x1= (-b-sqrtD)/2a=(-6-18)/2= -12 (it is negative, but width is only positive. So this root doesn't match)

x2=(-b+sqrtD)/2a= (-6+18)/2= 12/2=6 - the width

The length is 6+6=12

5 0
3 years ago
(3.2 * 10000000) -3
andreev551 [17]

The exponents distribute over factors:

(ab)^c = a^c \times b^c

so, you have

(3.2 \times 10^6)^{-3} = 3.2^{-3} \times (10^6)^{-3}

Let's focus on each factor: applying the definition of negative exponents, you have

3.2^{-3} = \cfrac{1}{3.2^3} \approx 0.03

While for the power of 10, you can use the following rule

(a^b)^c = a^{bc} to write

(10^6)^{-3} = 10^{6\cdot (-3)} = 10^{-18}

So, the expression evaluates to

0.03\times 10^{-18} = 3\times 10^{-20}

3 0
4 years ago
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