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4 years ago

IF ANSWER IS CORRECT AND U ARE THE FIRST PERSON TO ANSWER U WILL BE MARKED AS BRAINIEST!!

Mathematics

2 answers:

sergiy2304 [10]4 years ago

5 0

The answer should be 5.5 * 10 to the 5th power.

Alona [7]4 years ago

4 0

5.5x10^5 is the correct answer

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Find the surface area

ki77a [65]

Step-by-step explanation:

so for this one u do

$15 \times 9 + 9 \times 4 + 15 \times 4$

231 the times it by 2 for the both sides

231×2=462 cm2

hope this make sense :)

7 0

3 years ago

A number is randomly selected from {15, 16, 17, 18, 19, 20}. A is represented by the event that the number picked is less than o

Tatiana [17]

1/3
the denonator is 6 because that is the number of numbers there are, and the numerator is 2 because there are 2 numbers less than or equal to 16. you can simplify

5 0

4 years ago

Read 2 more answers

What is the circumference of the circle? r=6.4

nignag [31]

Answer:

C = 40.2124

Step-by-step explanation:

The formula for circumference is

C = 2*pi*r

where r is the radius.

Substitute what we know.

C = 2 * pi * 6.4

C = 12.8 * pi

If we use substitute pi in, we get

C = 40.2124

8 0

4 years ago

The local public transport authority is conducting research into commuter behaviour. A previous census indicated that the mean c

kondor19780726 [428]

Answer:

$H_0:\mu = 45$ and $H_a:\mu < 45$

$T = 34.88$

The null hypothesis is not rejected

Step-by-step explanation:

Given

Random sample of 50 commuter times

Solving (a): The null and alternate hypothesis

From the question, a previous census shows that:

$\mu =45$ and $\sigma= 9.1$

This is the null hypothesis i.e.

$H_0:\mu = 45$

Reading further, a new test was to show whether the average has decreased.

This is the alternate hypothesis, and it is represented as:

$H_a:\mu < 45$

Solving (b) and (c): The test statistic (T).

This is calculated using:

$T = \frac{\mu}{\sigma/\sqrt n}$

In this case:

$n = 50$ $\mu =45$ and $\sigma= 9.1$

So:

$T = \frac{45}{9.1/\sqrt{50}}$

$T = \frac{45}{9.1/7.07}$

$T = \frac{45}{1.29}$

$T = 34.88$

Solving (c): Accept or reject null hypothesis

$\alpha = 0.05$

First calculate the degrees of freedom (df)

$df = n - 1 = 50 - 1$

$d f = 49$

From the t distribution table,

At: $d f = 49$ , $\alpha = 0.05$ and $T = 34.88$

the t score is:

$p = 1.676$

$p > 0.05$

<em>So, the null hypothesis is not rejected</em>

7 0

3 years ago

The number of trees in garden discrete or continous

lana [24]

Answer:

The number of trees in a garden is discrete because you can count them easily.

Step-by-step explanation:

Discrete= The amount of something that is counted.

Continuous= Something that has to be measured.

Hope that helps. x

4 0

3 years ago