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3 years ago

By noon, it will be 75°F. Right now it is 15°F cooler. What is the current temperature?

Mathematics

2 answers:

Degger [83]3 years ago

8 0

Answer:

i think that is 50F hope it helped

Step-by-step explanation:

Setler79 [48]3 years ago

8 0

Answer:

60 degrees.

Step-by-step explanation:

Because if it will be 75 degrees, and the temperature right now is 15 degrees cooler, 75 minus 15 is 60.

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Step-by-step explanation:

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Irina-Kira [14]

Answer:

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Step-by-step explanation:

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3 years ago

Read 2 more answers

A professor at a local university noted that the exam grades of her students were normally distributed with a mean of 73 and a s

Umnica [9.8K]

Answer:

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

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.

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

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

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

Calculation the value from standard normal z table, we have,

$P(z \leq 1.410) = 0.9207$

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

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

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3 years ago