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3 years ago

"Which ratio does not belong with the other three?" Explain your reasoning." Help me on 3. Please

Mathematics

2 answers:

SIZIF [17.4K]3 years ago

8 0

12:15 does not belong, since that is a ratio of 4:5, whilst the others are all 3:4.

just olya [345]3 years ago

7 0

3:4 because their not eqivelant

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Schach [20]

step 1

magsagot ka nang magsagot ng mga question yun lang basta maganda yung sagot mo

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3 years ago

A researcher wishes to estimate the number of households with two cars. How large a sample is needed in order to be 99% confiden

solmaris [256]

Answer:

Sample size n = 1382

so correct option is D) 1382

Step-by-step explanation:

given data

confidence level = 99 %

margin of error = 3%

probability = 25 %

to find out

How large a sample size needed

solution

we know here P = 25 %

so 1 - P = 1 - 0.25

1 - P = 0.75

and we know E margin of error is 0.03 so value of Z for 99%

α = 1 - 99% = 1 - 0.99

α = 0.01

and $\frac{\alpha}{2}$ = $\frac{0.01}{2}$

$\frac{\alpha}{2}$ = 0.005

so Z is here

$Z_(\frac{\alpha}{2})$ = 2.576

sample size will be

Sample size n = $(\frac{(Z_(\frac{\alpha}{2})}{E})^2 * P * (1-P)$

put here value

Sample size n = (\frac{2.576}{0.03})^2 * 0.25 * 0.75

Sample size n = 1382

so correct option is D) 1382

3 0

3 years ago

Find the slope of the line that passes through the points (10, -2) and (10,-6)

defon

-6+2
--------- =
10-10
-4
---- =
0
m=0
*(the "-----" are supposed to be fractions, sorry if that looks confusing)*

y+2=0(x-10)
y+2=0
-2 -2
y=-2

Your answer would be "y=-2."

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2 years ago

How many times stronger is a magnitude 9.2 earthquake than a magnitude 6.4 earthquake? Round your answer to the nearest whole nu

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Answer:

i have tried but have no idea

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Step-by-step explanation:

8 0

3 years ago

State two numbers such that the grader number is 75% more than the lesser number

Marianna [84]

75% is equal to 3/4. So the easiest way to do this is to make the smaller number a multiple of 4. Let's say the smaller number is 8. To find the larger number, you must take 75% of 8 and then add it to 8. 1/4 of 8 equals 8 divided by 4, which is 2. Therefore, 3/4 of 8 is 6. 8 + 6 = 14.

Thus, your two numbers could be 8 and 14.

3 0

2 years ago