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Scilla [17]
3 years ago
11

Need math help!!!!!!!!!!!!!!!!!!!!!!!!!

Mathematics
1 answer:
frutty [35]3 years ago
5 0
Well we need to follow PEMDAS.  Parentheses, Exponents, Multiplication, Division, Addition, Subtraction.  The "X" is in the Exponents place.  Therefore we would take 10 X 5.5 first.  Which equals 55.  Then you have to take it times 1.  So the answer to the first one is 55.   Then with the next one, you do the same steps, except at the end, your exponent is 2.  So you would take 55 times 55 and get 3,025.  So the answer to your second one is 3,025.  Hope this is correct and hope this helps!

-Twix
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an aquarium has a ratio of 5 rays for every 3 sharks. What percent of this grouping of animals are rays
sashaice [31]

Answer:

62.5%

Step-by-step explanation:

Total number of animals in a group= 5+3=8 animals

Number of rays=5

Since we only have 5 rays out of the total 8, to express the number of rays as a percentage of the total animals, we divide the number of rays by the total animals then multiply by 100 to express in percentage as needed in the question

Percentage of rays=\frac {5}{8}\times 100=62.5

Therefore, the percentage is 62.5%

6 0
3 years ago
In a survey of 300 T.V. viewers, 40% said they watch network news programs. Find the margin of error for this survey if we want
bixtya [17]

Answer:

<h2>0.05543</h2>

Step-by-step explanation:

The formula for calculating the margin of error is expressed as;

M.E = z * \sqrt{\frac{p*(1-p)}{n} } where;

z is the z-score at 95% confidence = 1.96 (This is gotten from z-table)

p is the percentage probability of those that watched network news

p = 40% = 0.4

n is the sample size = 300

Substituting this values into the formula will give;

M.E = 1.96*\sqrt{\frac{0.4(1-0.4)}{300} }\\ \\M.E = 1.96*\sqrt{\frac{0.4(0.6)}{300} }\\\\\\M.E = 1.96*\sqrt{\frac{0.24}{300} }\\\\\\M.E = 1.96*\sqrt{0.0008}\\\\\\M.E = 1.96*0.02828\\\\M.E \approx 0.05543

Hence, the margin of error for this survey if we want 95% confidence in our estimate of the percent of T.V. viewers who watch network news programs is approximately 0.05543

5 0
3 years ago
The table below shows the results of a random sample of 160 teenagers. Based on the information given which of the following sta
Karolina [17]

Answer:

I would say that it is all of them besides the 35% of the participants do not like to surf.

7 0
3 years ago
Read 2 more answers
One day at school you make the observations that kids in 12th grade are taller than kids in 9th grade. What does this illustrate
beks73 [17]

Answer: B correlation

6 0
3 years ago
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Evaluate |3 - 5 + 7|. -5 5 -15 15
Semmy [17]

Answer:

5

Step-by-step explanation:

|3 - 5 + 7|

= |-2 + 7|

= |5| = 5

6 0
4 years ago
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