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3 years ago

What does y equal ? 4y^2= 5.76 y =

Mathematics

2 answers:

MArishka [77]3 years ago

7 0

Take the square root of each side and y = {-1. 2, 1. 2}hope this helps :-)

torisob [31]3 years ago

3 0

The answer is 1.2.
so you divid 5.76 by 4, and get 1.44, and then find the square root of 1.44 which is 1.2

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Umnica [9.8K]

Answer:

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Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 73

Standard Deviation, σ = 11

We are given that the distribution of exam grades is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

We have to find the value of x such that the probability is 0.0793.

$P( X \geq x) = P( z \geq \displaystyle\frac{x - 73}{11})=0.0793$

$= 1 -P( z \leq \displaystyle\frac{x - 73}{11})=0.0793$

$=P( z \leq \displaystyle\frac{x - 73}{11})=0.9207$

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$P(z \leq 1.410) = 0.9207$

$\displaystyle\frac{x - 73}{11} = 1.410\\x =88.51$

Hence, 88.51 is the minimum score needed to receive a grade of A.

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3 years ago

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Answer:

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