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3 years ago

I Nedd Help Please:(

Mathematics

1 answer:

PolarNik [594]3 years ago

5 0

Answer:

Step-by-step explanation:

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Arlecino [84]

25% is equal to 1/4 so 180 times 3/4 equals $135

3 0

3 years ago

The number of chocolate chips in a bag of chocolate chip cookies is approximately normally distributed with a mean of 1262 chips

Sholpan [36]

Answer:

Using z score formula:

X = z ∂ + µ

= 157.833

Step-by-step explanation:

Solution:

Mean = µ = 1262

Standard deviation = ∂ = 117

(a) 28th percentile for the number of chocolate chip.

P( z < z) = 28%

= 0.28

P( z<- 0.58) = 0.28

Z = -0.58

By using z score formula:

Z = x - µ /∂

-0.58= x – 117 / 1262

X = (- 0.58)(117) + (1262)

= 1194.14

(b) Middle 97% of bag.

P(-z < z < z) = 97%

= 0.97

P( z < z) – p(z < -z) = 0.97

2p(z < z) -1 = 0.97

2p (z < z) = 1 + 0.97

P(z < z) = 1.97 / 2

= 0.99

P(z < 2.33) = 0.99

Z ± 2.33

By using z score formula:

Z = x - µ / ∂

X = z ∂ + µ

= - 2.33 x 117 + 1262

=989.39

Z = 2.33

X = z ∂ + µ

= 2.33 x 117 + 1262

=1533.61

(c) What is the interquartile range of the number of chocolate chips in a bag of chocolate.

By using standard normal table,

The z dist’n formula:

P(z < z ) = 25%

=0.25

P(z < -0.6745) = 0.25

Z = 0.6745

Using z score formula:

X = z∂ + µ

= - 0.6745 x 117 + 1262

= 1183.0835

First quartile = Q1 =1183.0835

The third quartile is:

P(z<z) = 75%

= 0.75

P(z < 0.6745) = 0.75

Z = 0.6745

Using z score formula:

X = z ∂ + µ

= 0.6745 x 117 + 1262

= 1340.9165

IQR = Q3 – Q1

= 1340.9165 – 1183.0835

= 157.833

3 0

3 years ago

Emilia has a bag of colored marbles. The bag contains the same ratio of red marbles to blue marbles as the ratio of green marble

Nana76 [90]

A is the correct answer

Hope this helps!

8 0

3 years ago

La media aritmética de los siguientes datos son respectivamente: 1, 4, 1, 1, 4, 2, 3, 1, 4, 2Respuesta necesaria. Opción única.

AlekseyPX

Answer:

La media aritmética es 2.3

Step-by-step explanation:

Average o Promedio

El promerio, average, o valor medio es un valor representativo de un conjunto de datos y se calcula según la fórmula:

$\displaystyle \bar x=\frac{\sum x_i}{n}$

Donde xi es el valor de cada dato, y n es el número de datos.

Los datos presentados son:

1, 4, 1, 1, 4, 2, 3, 1, 4, 2

Nótese que hay un total de n=10 datos. Aplicamos la fórmula recordando que el símbolo Σ significa sumatoria:

$\displaystyle \bar x=\frac{1+ 4+ 1+ 1+ 4+ 2+ 3+ 1+ 4+ 2}{10}$

$\displaystyle \bar x=\frac{23}{10}=2.3$

La media aritmética es 2.3

8 0

3 years ago

Please help solve please

ser-zykov [4K]

First find the answer of volume and then add all the answer of the volume

7 0

3 years ago