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4 years ago

Please answer this!! will make you brainliast

Mathematics

1 answer:

gulaghasi [49]4 years ago

4 0

Answer:

x = 17 / sqrt (2)

Step-by-step explanation:

first we have to notice that we have a right triangle, this means we can apply Pythagoras

h^2 = c1^2 + c2^2

then we just have to put the values we have and solve the equation

17^2 = x^2 + x^2

289 = 2(x^2)

289/2 = x^2

√289/2 = x

√289 / √2 = x

17 / √2

17 / sqrt (2)

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In the table of the normal distribution, we can look for positive values z, and these values are going to represent the area under the curve between z=0 and the values searched. the negatives values are found by symmetry (with the corresponding positive value but remember this area is under the left side of the curve). To find a value in the table, find the units in the first column and the follow over the same row till you find the decimals required.

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$P_2=0.4772$

$P_1$ represents the probability of length being between 14.8 and 20 (the mean) and $P_2$ represents the probability of length being between 20 and 25.2, The requested probability is the sum of these two.