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enyata [817]
3 years ago
9

Can You Help Me With This?​

Mathematics
1 answer:
muminat3 years ago
4 0

Step-by-step explanation:

Total cups of fruit punch = 80

52 cups of fruit juice

Fraction of fruit juice to total = \frac{52}{80}

<u>What percent of punch is fruit juice:</u>

\frac{52}{80} * 100 = 65

Fruit Juice = 65%

What percent of punch is sparkling water:

There are 80 cups in total and 52 cups is fruit juice and the rest of the cups are sparkling water.

Find the number of cups of sparkling water by subtracting 52 from 80 and then divide that number by the total number of cups, which is 80 cups

80 - 52 = 28 cups of sparkling water

\frac{28}{80} * 100 = 35

Sparkling Water  = 35%

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An article in Fire Technology investigated two different foam-expanding agents that can be used in the nozzles of firefighting s
UNO [17]

Answer:

Step-by-step explanation:

Hello!

The objective of this experiment is to test if two different foam-expanding agents have the same foam expansion capacity

Sample 1 (aqueous film forming foam)

n₁= 5

X[bar]₁= 4.7

S₁= 0.6

Sample 2 (alcohol-type concentrates )

n₂= 5

X[bar]₂= 6.8

S₂= 0.8

Both variables have a normal distribution and σ₁²= σ₂²= σ²= ?

The statistic to use to make the estimation and the hypothesis test is the t-statistic for independent samples.:

t= \frac{(X[bar]_1 - X[bar]_2) - (mu_1 - mu_2)}{Sa*\sqrt{\frac{1}{n_1} + \frac{1}{n_2 } } }

a) 95% CI

(X[bar]_1 - X[bar]_2) ± t_{n_1 + n_2 - 2}*Sa* \sqrt{\frac{1}{n_1}+\frac{1}{n_2} }

Sa²= \frac{(n_1-1)S_1^2 + (n_2-1)S_2^2}{n_1 + n_2 - 2}= \frac{(5-1)0.36 + (5-1)0.64}{5 + 5 - 2}= 0.5

Sa= 0.707ç

t_{n_1 + n_2 -2: 1 - \alpha /2} = t_{8; 0.975} = 2.306

(4.7-6.9) ± 2.306* (0.707\sqrt{\frac{1}{5}+\frac{1}{5} })

[-4.78; 0.38]

With a 95% confidence level you expect that the interval [-4.78; 0.38] will contain the population mean of the expansion capacity of both agents.

b.

The hypothesis is:

H₀: μ₁ - μ₂= 0

H₁: μ₁ - μ₂≠ 0

α: 0.05

The interval contains the cero, so the decision is to reject the null hypothesis.

<u>Complete question</u>

a. Find a 95% confidence interval on the difference in mean foam expansion of these two agents.

b. Based on the confidence interval, is there evidence to support the claim that there is no difference in mean foam expansion of these two agents?

8 0
3 years ago
62x+4=33x×2x+8 please solve it​
seropon [69]
The answer is 74 i think so
6 0
2 years ago
Put the fractions in order starting with the smallest to the largest
stiks02 [169]

Answer:

21/40, 17/20, 29/40, 3/4, 4/5

Step-by-step explanation:

21/40 = 10.5/20

29/40 = 14.5/20

17/20 = 13.5/20

3/4 = 15/20

4/5 = 16/20

7 0
3 years ago
A man can paint one house in 12 hours. At this rate, how many houses could 18 men paint in 6 hours? A) 3 houses B) 6 houses C) 9
Mademuasel [1]

Answer:

The correct option is C. 9 houses could 18 men paint in 6 hours.

Step by step explanation:

Let the number of houses paint by 18 men in 6 hours be x.

One man can paint one house in 12 hours.

The part of house painted by a man in 1 hour is \frac{1}{12}.

The part of house painted by a man in 6 hour is

\frac{6}{12}=\frac{1}{2}

The total number of men is 18. Therefore the number of houses painted by 18 men is

x=\frac{1}{2}\times 18=9

Therefore correct option is C. 9 houses could 18 men paint in 6 hours.

5 0
3 years ago
Raise 7 to the 9th power, then find the sum of the result and y
Dima020 [189]

The sum of 7 to the 9th power and y is expressed as 7⁹ + y

This statement will result in an exponential equation since we will have a base and an exponent

  • 7 raise to the 9th power is expressed as 7⁹

  • Taking the sum of the result and y;

  • The final expression will be  7⁹ + y

Hence the sum of 7 to the 9th power and y is expressed as 7⁹ + y

Learn more here: brainly.com/question/11610038

6 0
2 years ago
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