1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Sergio039 [100]
3 years ago
6

At the zoo on monday, 65 percent of the people in attendance were children. if 520 children were in attendance, how many people

in total were visiting the zoo on monday? people in attendance
Mathematics
2 answers:
inna [77]3 years ago
7 0
Children = .65 * people
people = 520 / .65
800 people were in attendance

Vera_Pavlovna [14]3 years ago
4 0

Answer:

800 people were visiting the zoo on Monday.

Step-by-step explanation:

Let there be x people were visiting the zoo on Monday.

520 children were in attendance.

65 percent of the people in attendance were children.

⇒  \dfrac{65}{100}\times x=520

⇒ x=\dfrac{100}{65}\times 520

⇒ x=800

Hence, 800 people were visiting the zoo on Monday.

You might be interested in
Simplify the rational expressions. State any excluded values. Show your work. (3x - 6)/(x - 2)
cluponka [151]
Hello,

Put the 3 as a common factor.

Look:

3x - 6 = 3 . ( x - 2 )

Then,

( 3x - 6) / (x - 2) = 3 .( x - 2) / (x -2)

Now simplity ( x -2)

= 3
5 0
3 years ago
Read 2 more answers
Find the area to the nearest hundredth
Savatey [412]

Answer:

9.0586 OR

9.06

Step-by-step explanation:

IDK, used fusion 360

6 0
2 years ago
On February 1, the electricity meter reading for the Smith residence was 19,423 kilowatt hours. On March 1, the meter read 20,28
Karolina [17]
A. How many kilowatt hours of electricity did the Smiths use during February?

Kilowatt hours of electricity the Smiths used during February:
Meter read on March 1 - meter read on February 1 =
20,288 kilowatt hours - 19,423 kilowatt hours =
865 kilowatt hours
Answer: The Smiths used 865 kilowatt hours of electricity during February

b. How many kilowatt hours did they use during March?

Kilowatt hours of electricity the Smiths used during March:
Meter read on April 1 - meter read on March 1 =
21,163 kilowatt hours - 20,288 kilowatt hours =
875 kilowatt hours
Answer: The Smiths used 875 kilowatt hours of electricity during March
8 0
3 years ago
Ples help and ples give derect awnser not a link you will get brainly if u do
slamgirl [31]
Im sorry i don’t know this but you should try photomath, it might help!
7 0
3 years ago
Reading proficiency: An educator wants to construct a 99.5% confidence interval for the proportion of elementary school children
Shkiper50 [21]

Answer:

A sample size of 345 is needed so that the confidence interval will have a margin of error of 0.07

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}.

The margin of error of the interval is given by:

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

In this problem, we have that:

p = 0.69

99.5% confidence level

So \alpha = 0.005, z is the value of Z that has a pvalue of 1 - \frac{0.005}{2} = 0.9975, so Z = 2.81.

Using this estimate, what sample size is needed so that the confidence interval will have a margin of error of 0.07?

This is n when M = 0.07. So

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

0.07 = 2.81\sqrt{\frac{0.69*0.31}{n}}

0.07\sqrt{n} = 1.2996

\sqrt{n} = \frac{1.2996}{0.07}

\sqrt{n} = 18.5658

(\sqrt{n})^{2} = (18.5658)^{2}

n = 345

A sample size of 345 is needed so that the confidence interval will have a margin of error of 0.07

4 0
3 years ago
Other questions:
  • Please Helpppppp
    9·1 answer
  • Which is a composite number 9, 11, 31
    6·2 answers
  • What is 0.11111111111 as a fraction
    15·2 answers
  • 799.73 round to the nearest whole number
    9·2 answers
  • What is y?<br> HELP!<br> Pls.
    8·2 answers
  • Estimate with 2digit divisors
    7·1 answer
  • A bookshelf is 9 feet wide. A set of mystery books fills 1/6 of the shelf space. Each book in the set is 3/8 inch thick. How man
    10·1 answer
  • 1. Which expression is equivalent to the given expression? * -0.25 (84 – 32n) - n
    12·1 answer
  • The cost of 40 candy bars is $30 how much does 15 cost
    5·1 answer
  • 1/3•9•5 Dot means multiply
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!