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3 years ago

The diagonals of a rhombus bisect each other of measures 8cm and 6cm .Find its perimeter. please help !!!!!!!!!!!!!!!!!!!!!!!!

Mathematics

1 answer:

Delvig [45]3 years ago

8 0

Answer:

20 cm

Step-by-step explanation:

8/2 = 4

6/2 = 3

3 and 4 are the sides of the triangle (four triangles in rhombus)

$a^{2} + b^{2} = c^{2} \\4^{2} + 3^{2} = c^{2}$

c = 5

5 x 4 = 20

Hope that helped!!! k

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3 years ago

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mario62 [17]

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3 years ago

A stone is thrown horizontally with a speed of 15 m/s from the top of a vertical cliff at the edge of a lake. If the stone hits

pishuonlain [190]

Answer:

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We are given that

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4 years ago

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strojnjashka [21]

Answer:

a) $n=100,\,\mu_s = 14.7, \,\sigma_s=0.32$

b) $n=400,\,\mu_s = 14.7, \,\sigma_s=0.16$

c) "a.The mean of the sampling distribution stays the same, but the standard error decreases."

Step-by-step explanation:

a) We have a population with mean of 14.7 and standard deviation of 3.2.

We have to calculate the parameters of the sampling distribution (mean and standard deviation), for a sample size of n=100.

The mean for the sampling distribution is the same of the population:

$\mu_s=\mu=14.7$

The standard deviation of the sampling distribution is related to the population standard deviation by the inverse of the square of the sample size:

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b) For a sample size of n=400, the mean is the same (14.7), but the standard deviation becomes:

$\sigma_s=\sigma/\sqrt{n}=3.2/\sqrt{400}=3.2/20=0.16$

c) "a.The mean of the sampling distribution stays the same, but the standard error decreases."

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3 years ago