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garik1379 [7]
3 years ago
15

It is 2.3 km from Salma's house to the nearest mailbox. How far is it in meters?

Mathematics
1 answer:
Ivenika [448]3 years ago
7 0

Answer:

2.3km in meters is 2300 Meters

Step-by-step explanation:

Multiply the length value by 1000

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a random sample of 510 high school students has a normal distribution. The sample mean average ACT exam score was 21 with a 3.2
34kurt

Answer:

CI = 21 ± 0.365

Step-by-step explanation:

The confidence interval is:

CI = x ± SE * CV

where x is the sample mean, SE is the standard error, and CV is the critical value (either t score or z score).

Here, x = 21.

The standard error for a sample mean is:

SE = σ / √n

SE = 3.2 / √510

SE = 0.142

The critical value is looked up in a table or found with a calculator.  But first, we must find the alpha level and the critical probability.

α = 1 - 0.99 = 0.01

p* = 1 - (α/2) = 1 - (0.01/2) = 0.995

Using a calculator or a z-score table:

P(x<z) = 0.995

z = 2.576

Therefore:

CI = 21 ± 0.142 × 2.576

CI = 21 ± 0.365

Round as needed.

8 0
3 years ago
An initial population of 30 rabbits doubles each year for 6 years what is the rabbit population after 6 years?
yanalaym [24]

Answer:

1920

Step-by-step explanation:

Each time you multiply by to 6 times. 30 does not count as a year.

3 0
3 years ago
Express the total amount of fencing needed as an algebraic expression in x
professor190 [17]
Total amount of fencing 
= 4x + 3(3x + 1)
= 4x + 9x + 3
= 13x + 3
7 0
3 years ago
Simplifique a expressão 10ny-10x+10ny+10y
IRISSAK [1]

Responder:

10 (2ny- (x-y))

Explicación paso a paso:

Dada la expresión 10ny-10x + 10ny + 10y, para simplificar la expresión, se deben seguir los siguientes pasos;

Paso 1; Separa la expresión en términos similares

= 10ny-10x + 10ny + 10y

= (10ny + 10ny) - (10x + 10y)

Paso 2: Factoriza los valores comunes en ambos paréntesis

10ny (1 + 1) - 10 (x-y)

= 10ny (2) - 10 (x-y)

= 20ny - 10 (x-y)

Factoriza nuestro valor común en ambos términos:

= 10 (2ny- (x-y))

3 0
3 years ago
Dan painted a wall of 25m by 20m and the money he got for his work was Rs. 20 per square
guajiro [1.7K]

Answer:

He made Rs.500

He gave Rs.250 to the orphanage

Sharing

6 0
2 years ago
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