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Alla [95]
3 years ago
8

Jason went to his local zoo where 20% of it's exhibits featured canines. If the zoo features 25 exhibits in total, then how many

of the zoo's exhibits feature canines? Round your answer to the nearest whole number if necessary. _____________
Mathematics
1 answer:
Ratling [72]3 years ago
7 0

Answer:

\frac{25}{100}=\frac{x}{20}

And if we solve for the value of x we got:

x = 20* \frac{25}{100}=5

So then we can conclude that the number of canines is 5 for this case

Step-by-step explanation:

For this case we know that the total number of canines is 25 and 20% represent the canines so we can apply the following proportional rule:

\frac{25}{100}=\frac{x}{20}

And if we solve for the value of x we got:

x = 20* \frac{25}{100}=5

So then we can conclude that the number of canines is 5 for this case

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The range of values for the sample mean that fall within 1 standard error of the mean in a sampling distribution is M39 to M43.
marusya05 [52]

The question is incomplete! The complete question along with answer and explanation is provided below.

Question:

The range of values for the sample mean that fall within 1 standard error of the mean in a sampling distribution is M = 39 to M = 43. What Is the mean of the sampling distribution, and what is the standard error

a) mean = 41, standard error = 2

b) mean = 39 or 43, standard error = 2

c) mean = 41, standard error = 4

e) the mean and standard error are unknowns

Given Information:  

Standard error = 1

Range of values = 39 to 43

Required Information:  

Mean and standard error = ?

Answer:

Mean is 41 and Standard error is 2

Explanation:

We know that the mean and standard error are related as

s = μ + (1)ο

s = μ - (1)ο

43 = μ + (1)ο

39 = μ - (1)ο

option (a) satisfies the above equations

43 = 41 + (1)2

43 = 43

39 = 41 - (1)2

39 = 39

Therefore, the correct option is (a)

Mean is 41 and standard error is 2

5 0
3 years ago
The product of two consecutive odd integers is 1 less than four times their some. find the two integers.
nignag [31]
2 consecutive odd integers.....x and x + 2.....the product means multiply....the sum means add.

x(x + 2) = 4(x + x + 2) - 1
x^2 + 2x = 4(2x + 2) - 1
x^2 + 2x = 8x + 8 - 1
x^2 + 2x = 8x + 7
x^2 + 2x - 8x - 7 = 0
x^2 - 6x - 7 = 0
(x - 7)(x + 1) = 0

x - 7 = 0            x + 2 = 7 + 2 = 9
x = 7
 
x + 1 = 0           x + 2 = -1 + 2 = 1
x = -1

there can be 2 answers for this....
(1) 7 and 9
(2) -1 and 1
7 0
3 years ago
PLEASE HELP !! ILL GIVE BRAINLIEST *EXTRA 40 POINTS* DONT SKIP :(( .!
elena-14-01-66 [18.8K]

Answer:

<h2>B) one solution</h2>

Step-by-step explanation:

<h3>to understand this</h3><h3>you need to know about:</h3>
  • linear equation
  • PEMDAS
<h3>tips and formulas:</h3>
  • \sf\text{a system of linear equation has only one solution if $\frac{a_1}{a_2}\neq \frac{b_1}{b_2}$}
<h3>given:</h3>
  • \begin{cases}2x - 4y =  - 1 \\ 8x - 11y =  - 19 \end{cases}
<h3>let's solve:</h3>

  1. \sf substitute \: the \: value \: of \: a \: b :  \\  \frac{2}{8}   \ne  \frac{ - 4}{ - 11}  \\

\text{$\therefore$ the system of linear equation has only one solution}

6 0
3 years ago
For 15 points please help
iragen [17]

Answer:

The movers will need 3 crib-jacks

Step-by-step explanation:

Since each crib jack can lift 30,000lbs, and without the belongings it only weighs 90,000, which divided by 30,000 equals 3.

5 0
3 years ago
What is 14^5 divided by 14^-9 explain answer
yuradex [85]
I believe the answer is 1.1112007e+16 because 14^5=537824 and 14^-9= 4.8400258e-11. You divide both numbers and get 1.1112007e+16
8 0
3 years ago
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