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3 years ago

1/4 to 1/2 find the percent of change-increase or decrease

2 answers:

8 0

The percent of change would be -33.3% which would then equal a 33.3% decrease (when decimal is rounded)

what I did was turn 1/4 and 1/2 into decimals to make it easier to solve

Svet_ta [14]3 years ago

8 0

It's a decrease 1/4 to 1/2 is a decrease

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A container of orange juice contains 6 3/8 of juice. Jasmine used 3 6/8 ounces to make punch for a party,how many ounces are are

mel-nik [20]

Answer:

2 5/8 ounces of juice are left.

Step-by-step explanation:

6 3/8 - 3 6/8 =

51/8 - 30/8 (Converted into improper fractions.)
51/8 - 30/8 = 21/8
21/8 = 2 5/8 (Converted improper fraction into a mixed fraction.)

5 0

3 years ago

A screening test for a certain disease is used in a large population of people of whom 1 in 1000 actually have the disease. Supp

sertanlavr [38]

Answer:

$P(D/T)=5.05*10^{-6}$

Step-by-step explanation:

Let's call D the event that a person has the disease, D' the event that a person doesn't have the disease and T the event that the person tests negative for the disease.

So, the probability P(D/T) that a randomly chosen person who tests negative for the disease actually has the disease is calculated as:

P(D/T) = P(D∩T)/P(T)

Where P(T) = P(D∩T) + P(D'∩T)

So, the probability P(D∩T) that a person has the disease and the person tests negative for the disease is equal to:

P(D∩T) = (1/1000)*(0.005) = 0.000005

Because 1/1000 is the probability that the person has the disease and 0.005 is the probability that the person tests negative given that the person has the disease.

At the same way, the probability P(D'∩T) that a person doesn't have the disease and the person tests negative for the disease is equal to:

P(D'∩T) = (999/1000)*(0.99) = 0.98901

Finally, P(T) and P(D/T) are equal to:

P(T) = 0.000005 + 0.98901 = 0.989015

$P(D/T) = 0.000005/0.989015 = 5.05*10^{-6}$

8 0

3 years ago

A) simplify 5m-m-m+3m<br> B) simplify 3xnxpx6

zysi [14]

Answer:

a) =6m

b) =18np

Step-by-step explanation:

a)5m-m-m+3m=6m

b)3*6=18np

7 0

3 years ago

Read 2 more answers

Help??? *****20 Points*****

Dominik [7]

1. No; it is not written as a number times the power of 10.

2. 1.22×10^9

3. 2.87×10^−2

4. 5000

5. is answered in attached picture.

6. 3.212×10^3

4 0

3 years ago

A survey conducted in July 2015 asked a random sample of American adults whether they had ever used online dating (either an onl

Nadusha1986 [10]

Answer: $(0.081,\ 0.163)$

Step-by-step explanation:

Let $\hat{p}$ be the sample proportion.

As per given , we have

n= 411

$\hat{p}=\dfrac{50}{411}=0.121654501217\approx0.122$

Standard error : se=0.016

Critical value for 99% confidence : $z_{\alpha/2}=2.576$

Confidence interval for population proportion :-

$\hat{p}\pm z_{\alpha/2} (se)\\\\=0.122\pm (2.576)(0.016)\\\\=0.122\pm0.041216\\\\=(0.122-0.041216,\ 0.122+0.041216)\\\\=(0.080784,\ 0.163216)\approx(0.081,\ 0.163)$

Hence, the 99% confidence interval for the proportion of all US adults ages 55 to 64 to use online dating : $(0.081,\ 0.163)$

8 0

4 years ago