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3 years ago

2 3/4 ÷ 3 2/3 ⋅ 3 3/4 ÷ 2 1/2

Mathematics

1 answer:

Lera25 [3.4K]3 years ago

7 0

Answer:

2 3\4 divided bu 3 2\3 = 3\4 3 3\4 divieded by 2 1\2= 1 1\2

Step-by-step explanation:

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An art history professor assigns letter grades on a test according to the following scheme.A: Top 5% of scoresB: Scores below th

adoni [48]

Answer:

Grade B score:

$76 \leq x \leq 89$

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 73.3

Standard Deviation, σ = 9.7

We are given that the distribution of score on test is a bell shaped distribution that is a normal distribution.

Formula:

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

B: Scores below the top 5% and above the bottom 62%

We have to find the value of x such that the probability is 0.62

$P( X > x) = P( z > \displaystyle\frac{x - 73.3}{9.7})=0.62$

$= 1 -P( z \leq \displaystyle\frac{x - 73.3}{9.7})=0.62$

$=P( z \leq \displaystyle\frac{x - 73.3}{9.7})=0.38$

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

$\displaystyle\frac{x - 73.3}{9.7} = 0.305\\\\x = 76.26$

We have to find the value of x such that the probability is 0.05

$P(X < 0.95) = \\\\P( X < x) = P( z < \displaystyle\frac{x - 73.3}{9.7})=0.95$

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

$\displaystyle\frac{x - 73.3}{9.7} = 1.645\\\\x = 89.26$

Thus, the numerical value of score to achieve grade B is

$76 \leq x \leq 89$

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3 years ago

0.34 into a percent

vivado [14]

34% is the correct answer

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astra-53 [7]

When dividing variables that ave the same base, keep the base and subtract the powers.y^9/y^3 = y^(9 - 3) = y^6

The answer is y^6

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3 years ago

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Answer:

B: -13*

C: -2*

D: 8*

E: -11*

Step-by-step explanation:

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2 years ago

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n200080 [17]

Answer:

Each line has the 3 dashes meaning equivalent

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2 years ago

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