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2 years ago

A=3 square root of 3 B=3 C=7 D=6

Mathematics

2 answers:

Neko [114]2 years ago

8 0

Answer:

$3\sqrt{3}$

Step-by-step explanation:

This triangle is a 30°-60°-90° triangle, so you should always remember the rule shown in the picture. Because y is across from the 60° angle, it will be $x\sqrt{3}$ . 3 is x because it is across from the 30° angle, so y will be $3\sqrt{3}$ .

Zepler [3.9K]2 years ago

7 0

I think D=6 square root of 3

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The waking time of a student under common conditions is normally distributed with mean of 30 hours and a standard deviation of 5

Elina [12.6K]

Answer:

If the walking time is greater than or equal to 38.225 hours, than it exceeds 95% probability that is lie in top 5%.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 30 hours

Standard Deviation, σ = 5 hours

We are given that the distribution of waking time 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 0.95

$P( X < x) = P( z < \displaystyle\frac{x - 30}{5})=0.95$

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

$\displaystyle\frac{x - 30}{5} = 1.645\\\\x = 38.225$

Thus, if the walking time is greater than or equal to 38.225 hours, than it exceeds 95% probability that is lie in top 5%.

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3 years ago

Item 4<br> Write the word sentence as an inequality.<br><br> A number b is at least −3.

never [62]

Answer: b≥-3

Step-by-step explanation:

at least means that it's great or equal than -3.

b≥-3

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2 years ago

A jet ski rental charges A flat rate of $75 ,plus an additional $60 per hour you want to spend less than $200. for how many hour

cluponka [151]

The equation to solve would be setting

60×- the m plus 75,the b set to 200 the maximum that's wanted to be used. the equation will look like this

200=60x+75

-75. -75

125=60x
125/60 60x/60

2.08=x

and since you cant round the time the answer will be left at 2

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2 years ago

Jose set a goal of saving at least $200 in a savings account. He currently has $60 in the

Dovator [93]

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2 years ago

Read 2 more answers

A recipe for fruit salad includes 1/5 cup of grapes for 3 servings. How many cups of grapes are needed for 50 servings of this f

choli [55]

Answer:

300 is your answer

Step-by-step explanation:

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2 years ago