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3 years ago

Can someone help me please ASAP

Mathematics

2 answers:

Vadim26 [7]3 years ago

8 0

Answer:

Step-by-step explanation:

(6/2)^2 = 9

yKpoI14uk [10]3 years ago

6 0

Answer:

A≈28.27

Step-by-step explanation:

Using the formulas

A=πr2

d=2r

Solving forA

A=1

4πd2=1

4·π·62≈28.27433

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3x + 14 = 20 - 2x. What is x and how to solve it?

wlad13 [49]

3x + 14 = 20 - 2x

add 2x to each side

5x +14 = 20

subtract 14 from each side

5x = 6

x = 6/5 = 1 1/5

Answer: 1 1/5

3 0

3 years ago

What is the correct simplified form of 3±95√3 ?

sergejj [24]

Answer:

3±95√3 is simplified as 167.5495 or - 161.5495

Step-by-step explanation:

Given expression;

3±95√3

This expression can be simplified as;

3±95√3 = 3 + 95√3 or 3 - 95√3

= 3 + 95(1.7321) or 3 - 95(1.7321)

= 3 + 164.5495 or 3 - 164.5495

= 167.5495 or - 161.5495

Therefore, 3±95√3 is simplified as 167.5495 or - 161.5495

8 0

3 years ago

Read 2 more answers

Subject : Mathematics

storchak [24]

Answer:

Sorry I can't understand.

8 0

3 years ago

four friends ordered Chinese food for dinner. The Kung Fu chicken cost $11. does sweet and sour pork cost $8 and the Mongolian b

yarga [219]

Step 1 - Add up all the prices , 11 + 13+ 8

Step 2 - find the sum , 11+13+8 equals 32 dollars

Step 3 - divide 32 by 4

( 32 is the total price and 4 is how many people are sharing the food)

The answer is 8 dollars per person

7 0

4 years ago

The lifetime of a certain type of battery is normally distributed with mean value 15 hours and standard deviation 1 hour. There

KIM [24]

Answer:

If the lifetime of batteries in the packet is 40.83 hours or more then, it exceeds for 5% of all packages.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 15

Standard Deviation, σ = 1

Sample size = 4

Total lifetime of 4 batteries = 40 hours

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

Formula:

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

Standard error due to sampling:

$\displaystyle\frac{\sigma}{\sqrt{n}} = \frac{1}{\sqrt4} = 0.5$

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

P(X > x) = 0.05

$P( X > x) = P( z > \displaystyle\frac{x - 40}{0.5})=0.05$

$= 1 -P( z \leq \displaystyle\frac{x - 40}{0.5})=0.05$

$=P( z \leq \displaystyle\frac{x - 40}{0.5})=0.95$

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

$\displaystyle\frac{x - 40}{0.5} = 1.64\\x = 40.825 \approx 40.83$

Hence, if the lifetime of batteries in the packet is 40.83 hours or more then, it exceeds for 5% of all packages.

8 0

4 years ago