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3 years ago

Which statement is NOT true?

Mathematics

1 answer:

nydimaria [60]3 years ago

5 0

Answer:

Step-by-step explanation:

D because the red dots seem to represent outliers, and on Group 8, there are 2 outliers, not 3. Hope this helps!

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Solove. draw and lable a tape diagram to subtract tens. write the new number sentence.

garri49 [273]

23-9=14
24-10=14 BOTH EQUASTIONS ARE EQUAL

4 0

3 years ago

Read 2 more answers

A circular bicycle reflector has a diameter of 5 cm. What is the approximate area of the reflector? Use 3.14 to approximate pi a

grandymaker [24]

Answer:

Step-by-step explanation:

Area=pi×radius^2 so if diameter is 5 then radius is half that which is 2.5. So it should be a=3.14 × 2.5^2. I hope that's right.

7 0

4 years ago

Shirley estimated the length of a board to be 18 inches. The actual length is 23 inches. To the nearest tenth of a percent, what

artcher [175]

The percent error of Shirley's estimate is 21.74%

<h3>Calculating pecent error</h3>

Given the following parameters

Actual length = 23 inches
Estimated length = 18in

% error = actual-estimated/actual * 100

% error = 23-18/23 * 100

% error = 500/23

% error = 21.74%

Hence the percent error of Shirley's estimate is 21.74%

Learn more on percent error here: brainly.com/question/5493941

5 0

2 years ago

Read 2 more answers

What is the equilivant expression in the simplest form for 2y+4(y+1) ???

mihalych1998 [28]

Answer:6y+4

Step-by-step explanation:

2y + 4y + 4 when you do the distributive property, then

simply to

6y + 4

<!> Brainliest is appreciated! <!>

5 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