All categories

2 years ago

What is the measure of the radius of the cone in the diagram below?

Mathematics

1 answer:

Anastasy [175]2 years ago

3 0

Answer:

4cm

Step-by-step explanation:

the diameter is labelled as 8cm

radius is half of the diameter

You might be interested in

A recent study focused on the number of times men and women send a Twitter message in a day. The information is summarized below

jok3333 [9.3K]

Answer:

The value of the test statistic = 2.58

Test statistic Z = - 4.805

|Z| = 4.805 > 2.58

Null hypothesis is rejected The value of the test statistic = 2.58

There is significant difference between in the mean number of times men and women send a Twitter message in a day

Step-by-step explanation:

Step(i):-

Sample size of men n₁ = 25

mean of the first sample x₁⁻ = 20

Standard deviation of the first sample σ₁ = 5

Sample size of women n₂ = 30

mean of the second sample x₂⁻ = 30

Standard deviation of the first sample σ₂ = 10

Level of significance ∝= 0.01

<u>Step(ii)</u>:-

Null Hypothesis : H₀: There is no significant difference between in the mean number of times men and women send a Twitter message in a day

Alternative Hypothesis :H₁:There is significant difference between in the mean number of times men and women send a Twitter message in a day

Test statistic

$Z = \frac{x^{-} _{1} - x^{-} _{2} }{\sqrt{\frac{S.D_{1} ^{2} }{n_{1} }+\frac{ S.D_{2} ^{2}}{n_{2} } } }$

$Z = \frac{20 - 30 }{\sqrt{\frac{(5)^{2} }{25 }+\frac{ (10)^{2} }{ 30} } }$

Z = $\frac{-10}{2.081} = - 4.805$

The value of the test statistic = 2.58 C

|Z| = 4.805 > 2.58

Null hypothesis is rejected The value of the test statistic = 2.58

<u>Conclusion:</u>-

There is significant difference between in the mean number of times men and women send a Twitter message in a day

7 0

2 years ago

Which of the following expressions is equivalent to?

gayaneshka [121]

Answer:

It's the last choice: 2x^2 - 5x - 8 - 37/(x - 5).

Step-by-step explanation:

Long division:

2x^2 - 5x -8 <---------------Quotient

---------------------------------

x - 5 ) 2x^3 - 15x^2 + 17x + 3

2x^3 - 10x^2

- 5x^2 + 17x

- 5x^2 + 25x

- 8x + 3

- 8x + 40

-37 <------ Remainder.

7 0

2 years ago

WebAssign will do simple calculations for you, using , -, *, /, parentheses, and e-notation. For example, if a question asks for

kondor19780726 [428]

Answer:

$10800$

Step-by-step explanation:

To solve any equation we use PEDMAS rule(this is the sequence of priorities) where:

P: Parentheses

E: Exponent

D: Division

M: Multiplication

A: Addition

S: Subtraction

In the expression $120\times 90$ ,there is only one operation is used that is multiplication.

$120\times 90=10800$

4 0

3 years ago

There are 10 children in a class and 2 of them choose to read a books so what is the probability that a randomly selected presch

kiruha [24]

Answer: a 20% chance

Step-by-step explanation:

All you need to do is 2/10 = .2 = 20%

We do this because if 2 chose to read and there are 10 kids.

8 0

2 years ago

Find the length of a side of a square if its área is 4/25 cm2

USPshnik [31]

Answer:

2/5cm or 0.4cm

Step-by-step explanation:

Area of square = $Side^{2}$

Thus, Side = $\sqrt{Area}$

= $\sqrt{4/25}$

= 2/5 cm = 0.4cm

4 0

3 years ago