divide 18 cups if flour into two groups so the ratio is 4 to 5

Answers

Answer 1

Answer: Let us divide the flour into two groups, A and B
now we know from the given question
A/B = 4/5
A = 4B/5
We also know there are 18 cups of flour in total.
A + B = 18
So
(4B/5) + B = 18
(4B/5) + (5B/5) = 18
9B/5 = 18
B = (18*5)/9
   = 10
Then
A = 18 - B
   = 18 - 10
   = 8
So the ratio of dividing the 18 cups is 8:10

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20% of 50 is what number

PLEASE HELP

Answers

To find a percentage, multiply the number by the percentage as a decimal. 20% as a decimal is .2.
50 times .2 is 10
50×.2=x
50×.2 = 10
10=10

20% of 50 is 10!

To get 20% of a question you would have to be able to divide by 5 so 50/5=10. So the answer is 10. Hope this helped.

A local flower shop is selling $1 raffle tickets and is donating all proceeds to the children's hospital. They sold 5,500 tickets and plan to give away 20 flower arrangements valued at $70 and 20 gift certificates valued at $25. Find the expected value of purchasing a raffle ticket.Round to the nearest cent. Do not round until the final calculation.

Answers

The expected value of purchasing a raffle ticket is -0.647.

What is the Expected Value of a Probability & Statistical Analysis?

The expected value is derived in probability analysis by the multiplication of each of the potential possibilities by the likelihood that each result will occur and then adding all of those values together.

Using the formula below, we can calculate the expected value as follows:

$\mathbf{ E(X)= \sum^(n)_(i=1)X_i P(X_i)}$

However, the probability (Pr) of each event can be categorized as follows:

Pr (to win a flower arrangement ) $\mathbf{=(20)/(5500)}$

Pr (to gift a certificate) $\mathbf{=(20)/(5500)}$

Pr (no win) ) $\mathbf{=(5500 - 20 - 20)/(5500)=(5460)/(5500)}$

Thus;

$\mathbf{E(X) = 70((20)/(5500) * 25 (((20)/(5500) )- 1((5460)/(5500) )}$

$\mathbf{E(X) =-0.647}$

Learn more about finding the expected value of a probability here:

brainly.com/question/9931880

Answer: The expected value of purchasing a raffle ticket would be $0.3449.

Step-by-step explanation:

Since we have given that

Number of tickets = 5500

Number of flower arrangements = 20

Number of gift certificates = 20

So, Probability that wining $70 at flower arrangement = $(20)/(5500)=(1)/(275)$

Probability that wining $25 at gift certificates = $(20)/(5500)=(1)/(275)$

So, Expected value of purchasing a raffle ticket would be

$70* (1)/(275)+25* (1)/(275)\n\n=0.254+0.0909\n=\$0.3449$

Hence, the expected value of purchasing a raffle ticket would be $0.3449.

How will you write 5 x 5 x 5 x 5 x 5 as an exponential expression?OA. 5x5
OB. 55
Oc. 545
OD. 5
Reset
Next

Answers

Answer:

Step-by-step explanation:

5 * 5 * 5 * 5 * 5 = 5^5

Written in Latex, which is the best way to show this, the answer is

$5^(5)$

I think you might mean B. If you do then it is correct, but it must be shown as 5^5

8. Karyn proofreads 15 pages in 2 hours for $40.a. What is her proofreading rate in pages per hour?

b. How much does she receive on average for a page?

if able answer both also its Rate (unit rate's possilbe)

Answers

Hi , Karyn proofreads 5 pages per hour , basically two half hours are equal to 10 pages , then 1 hour equals 5 pages . She will receive 16 dollars for one page , because she receives 20 dollars for 5 pages . The unit rate is 5 pages per hour.

The librarian was checking the thicknesses of several books and found that the average thickness of a book was 1.8 centimeters. She found this by averaging the thicknesses of five different books. Four of the thicknesses were 1.4 cm, 1.9 cm, 2.1 cm, and 2.4 cm. What was the thickness of the fifth book that she measured?