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2 years ago

Help if cool | will give brainliest

Mathematics

2 answers:

navik [9.2K]2 years ago

6 0

Answer:

4/9 miles an hour

Step-by-step explanation:

You have to do 1/3 ÷ 3/4 = 4/9

iogann1982 [59]2 years ago

3 0

Step-by-step explanation:

distance walked by him = 1/ 3 miles

time taken in doing so = 3/ 4 hrs.

$speed \: acquired \: by \: him \: = \frac{distance}{time}$

$= \frac{ \frac{1}{3} }{ \frac{3}{4} } \\ = \frac{ 1}{3} \times \frac{4}{3} \\ = \frac{4}{9} \: miles \: hr^{ - 1}$

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After calculating the sample size needed to estimate a population proportion to within 0.05, you have been told that the maximum

Svetlanka [38]

Answer: 40000

Step-by-step explanation:

The formula to find the sample size is given by :-

$n=p(1-p)(\dfrac{z_{\alpha/2}}{E})^2$ , where p is the prior estimate of the population proportion.

Here we can see that the sample size is inversely proportion withe square of margin of error.

i.e. $n\ \alpha\ \dfrac{1}{E^2}$

By the equation inverse variation, we have

$n_1E_1^2=n_2E_2^2$

Given : $E_1=0.05$ $n_1=1000$

$E_2=0.025$

Then, we have

$(1000)(0.05)^2=n_2(0.025)^2\\\\\Rightarrow\ 2.5=0.000625n_2\\\\\Rightarrow\ n_2=\dfrac{2.5}{0.000625}=4000$

Hence, the sample size will now have to be 4000.

6 0

2 years ago

Please help a kid out

Vlad1618 [11]

15/24

4 2/3=(4*3)+2/3=14/3

simply 15/24

15/3/24/3=5/8

refine

5/8*14/3

8 and 14 share a factor of 2

8/2=4

14/2=7

refine

5/4*7/3

5*7/4*3

35/12

convert to mixed number

35/12=2.11

2 11/12

the answer is 2 11/12

7 0

3 years ago

A box without a top is made from a rectangular piece of cardboard, with dimensions 27 centimeters by 18 centimeters, by cutting

GaryK [48]

By cutting each corner we have that the resulting dimensions are:
27 - 2x
18 - 2x
Height = x
Therefore, the volume of the box in terms of the variable x, is given by:
V (x) = (x) * (27-2x) * (18-2x)
Answer:
The volume of the box in terms of x is:
(27-x) (18-x) x

8 0

3 years ago

Read 2 more answers

What is (x2 - 7x + 12) / (x-3) A. X-4 B. X-10 C. -4x+12 D. X-3

dybincka [34]

The answer is A. x - 4

5 0

2 years ago

The area of a triangle is A = bh/2 What would be the formula for h?

babymother [125]

Answer:

h = 2A/b

Step-by-step explanation:

multiply both sides by 2

2A = bh

divide both sides by b

2A/b = h

8 0

3 years ago