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3 years ago

I need an explanation step by step for this question. Thx

Mathematics

1 answer:

Harrizon [31]3 years ago

8 0

Answer:

1:5, 5, 15

Step-by-step explanation:

The original ratio of red marbles to white marbles is 6:30 and you need to know how many white marbles are expected with 3 red marbles so you have to make the # of red marbles 3 so you can divide by 2 and you'll get 15 white marble or you could've divided both sides by 6 and get the ratio of red marbles to white marbles as 1:5 and you can see that for every one red marble there is 5 white marbles.

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HELP HELP HELP

mojhsa [17]

Answer:

2998 ; 17%

Step-by-step explanation:

Given the function:

t(c)=-3970.9(ln c)

c = % of carbon remaining ; t = time

1.) c = 47% = 47/100 = 0.47

t(0.47) = - 3970.9(In 0.47)

t = - 3970.9 * −0.755022

t = 2998.119

t = 2998

B.)

t = 7000

t(c)=-3970.9(ln c)

7000 = - 3970.9(In c)

7000 / - 3970.9 = In c

−1.762824 = In c

c = exp(−1.762824)

c = 0.1715596

c = 0.1715596 * 100%

c = 17.156% ; c = 17%

8 0

3 years ago

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What is a polygon with four right angles and four sides

german

a square ///////////

4 0

3 years ago

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The mean life of a certain brand of auto batteries is 44 months with a standard deviation of 3 months. Assume that the lives of

alisha [4.7K]

Answer:

99.7%

Step-by-step explanation:

Using the z score formula

z-score is z = (x-μ)/σ

where:

x = raw score

μ = population mean

σ = population standard deviation.

a) for x = raw score = 35

μ = population mean = 44

σ = population standard deviation =3

z = (35 - 44)/3

z = -9/3

z = -3

b) for x = raw score = 53

μ = population mean = 44

σ = population standard deviation =3

z = (53 - 44)/3

z = 9/3

z = 3

We would use the standard normal distribution table to find their probabilities

P(Z<=-3)=0.0013499

P(Z<=+3)=0.99865

So P(-3<=Z<=3)=0.99865 - 0.0013499 = 0.9973

Converting to percentage = 0.9973 × 100 = 99.73%

Therefore, the percentage of auto batteries of this brand that have a life of 35 to 53 months to one decimal place is 99.7%

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3 years ago

D. 3, 7, 13, 21, 31.<br> Cual es la expresión algebraica??

ololo11 [35]

Answer:

d. 3, 7, 13, 21, 31.

Cual es la expresión algebraica??

Step-by-step explanation:

d. 3, 7, 13, 21, 31.

Cual es la expresión algebraica??d. 3, 7, 13, 21, 31.

Cual es la expresión algebraica??

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3 years ago

~Have I found, everybody a fun assignment to do today?~

Serga [27]

Answer:

um thanks i guess

Step-by-step explanation:

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