MATHEMATICS COLLEGE

7. Falls Canyon has an area of 1458 square miles. If the population density of deer is 50 deer per square mile, what is the total population of deer, rounded to the nearest thousand?70,000
10,000
73,000
7,000

Answers

Answer 1
Answer:

Answer:

73,000

Step-by-step explanation:

1458*50=72000
Answer 2
Answer:

Answer:

73,000

Step-by-step explanation:

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Which equation represents a proportional relationship that has a constant of proportionality equal to One-fifth?

Answers

Answer:

y=1/5x  or y=.2x

Step-by-step explanation:

the constant=k the equation is always  y=kx  and if the constant of proportionality is 1/5 you would do  y=1/5x  or y=.2x

Answer:

C. y = one-fifth x

Step-by-step explanation:

I took the quiz

You need to purchase juice for a party. The juice is sold for $3 per gallon or $2.50 per quart. You will need 12 oz for each of the 30 students in the class. How much juice will you need

Answers

To determine the amount of juice you will need you will multiply the number of students by how much juice each student will get.  This is the idea of grouping.  We will need 30 groups of 12 ounces.

30 x 12  = 360 ounces.

You will need 360 ounces of juice.

anna needs at least $1000 to pay her bills this week.she has $250 in the bank and makes $15 an hour at her job.how many hours does she have to work thus week in order to pay her bills​

Answers

She should only have to work about 50 hours

A researcher wishes to estimate, with 90% confidence, the population proportion of likely U.S. voters who think Congress is doing a good or excellent job. Her estimate must be accurate within 2% of the true proportion(a) No preliminary estimate is available. Find the minimum sample size needed.
(b) Find the minimum sample size needed, using a prior study that found that 28% of the respondents said they think Congress is doing a good or excellent job.
(c) Compare the results from parts (a) and (b).

Answers

The sample size just be 752.

What is confidence interval?

A confidence interval (CI) for an unknown parameter in frequentist statistics is a range of estimations. The most popular confidence level is 95%, but other levels, such 90% or 99%, are occasionally used for computing confidence intervals. The fraction of related CIs over the long run that actually contain the parameter's true value is what is meant by the confidence level. The degree of confidence, sample size, and sample variability are all factors that might affect the width of the CI. A larger sample would result in a narrower confidence interval if all other factors remained constant. A wider confidence interval would also be required by a higher confidence level and would be produced by a sample with  (1.645 / 0.03)2 * 0.5 * 0.5

=752

Sample size = 752

= 1 - 0.42 = 0.58

margin of error = E =3 % = 0.03

At 90% confidence level z

Hence, The sample size just be 752.

Learn more about confidence interval, by the following link.

brainly.com/question/17097944

#SPJ1

Determine the number of solutions for systems x+y=2 and 2x+2y=8

Answers

Answer:

no solutions

Step-by-step explanation:

x+y=2

2x+2y=8

Multiply the first equation by -2

-2x -2y = -4

Add this to the second equation

-2x -2y = -4

2x+2y=8

--------------------

0x+0y = 4

0=4

This is never true

so there are no solutions

Marisol and Mimi walked the same distance from their school to a shopping mall. Marisol walked 2 miles per hour, while Mimi left an hour later and walked 3 miles per hour. If they reached the mall at the same time how far is the mall from their school?

Answers

Let the time in hours after Marisol starts walking be t  and so the time in hours after Mimi starts walking is (t-1)
The distance walked by Marisol=speed*time=2t
Distance walked by Mimi=3(t-1)

When they've reached school they've all walked the same distance so:
3(t-1)=2t
3t-3=2t
3t-2t=3
t=3
Thus the distance from the mall to their school is 2t=2*3=6 miles
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