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kaheart [24]
3 years ago
6

Please help I will vote Brainiest hurry!! Ignore that they r already answered I can't get rid of them and they r probably wrong

so please help???

Mathematics
1 answer:
GaryK [48]3 years ago
5 0

Answer:

i am prtty sure it gores  dot 3, dot 2, and dot 4

Step-by-step explanation:

dont quote me on that tho

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if a sample size 40 is drawn from the population that has mean 276 and a variance of 81, what is the probability that the mean o
lapo4ka [179]

Answer:

The probability is 0.017429

Step-by-step explanation:

We start by calculating the z-score

Mathematically;

z-score = (x-mean)/SD/√n

In this case;

x = 273

mean = 276

SD = √(variance) = √81 = 9

n = 40

Substituting these values into the z-score formula, we have that;

z = (273-276)/9/√40

z = -2.11

So we proceed to get the probability

the probability in this case is;

P( z < -2.11)

We can use the normal distribution table for this

Our answer will be

P( z < -2.11) = 0.017429

4 0
3 years ago
I need help on this question
rosijanka [135]

Answer:

11. Volume = 2181.2mm^3

12. Surface Area = 1204.49mm^2

Step-by-step explanation:

We first need to find the hypotenuse side of the triangle using the Pythagorean theorem:

a^2+b^2 = c^2

13.3^2+20.5^2 = c^2

176.89+420.25 = c^2

597.14 = c^2

24.44 = c

Now we can find the volume using the formula:

V = 1/4(16)sqrt-13.3^4+2(13.3*20.5)^2+2(13.3*24.44)^2

-20.5^4+2(20.5*24.44)^2-24.44^4

V = 2181.2mm^3

To find the surface area using the surface area formula:

A = (13.3*16)+(20.5*16)+(24.44*16)+1/2sqrt

13.3^4+2(13.3*20.5)^2+2(13.3*24.44)^2

-20.5^4+2(20.5*24.44)^2-24.44^4

A = 1204.49mm^2

7 0
3 years ago
What is 6 x 8 1/2<br><br> Please show me how to do it
Andrei [34K]
Answer:
= 6/1 × 17/2

= (6 × 17) / (1 × 2)

= 102/2

= 51/1

<span>= 51</span>
3 0
3 years ago
A money bank has twice as many nickels as dimes. There is exactly $2.00 in the bank. How many nickels are there?
Makovka662 [10]
There is 16 nickels in 2 dollars
7 0
3 years ago
A local park has a grassy playground that is 3/5 mile long and 1/3 mile wide. What part of a square mile does the playground cov
adell [148]

Answer:

The playground covers \frac{1}{5} of a square mile


Step-by-step explanation:

The playground is a rectangular ground. The area of a rectangle is given by legth * width, hence,

The area of the playground is length * width

Area = \frac{3}{5}*\frac{1}{3}=\frac{3}{15}=\frac{1}{5} sq. mi


Hence the playground cover \frac{1}{5} of a square mile

5 0
3 years ago
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