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egoroff_w [7]
3 years ago
10

As part of a survey, 150 students were asked to name their favorite class. 50 points

Mathematics
1 answer:
disa [49]3 years ago
5 0
A:40%
If you put 60 over 150 and x(percent of students) over 100 and cross multiply 100 and 60, you will get 6000. You then divide that by 150 which leaves you with 40 as x and 40 over 100 is 40%.
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An opinion poll surveyed 900 people and reported that 36% believe a certain governor broke campaign financing laws in his electi
Anuta_ua [19.1K]

Answer:

The confidence Interval = (0.329, 0.391)

Step-by-step explanation:

Formula for the Confidence Interval for proportion =

p ± z × √p(1 - p)/n

where

p = x/n

From the question

n = 900 people

x = 36% of 900 people

= 36/100 × 900

= 324

z = z score of 95% confidence Interval

z = 1.98

p = x/n

= 324/900

= 0.36

Confidence Interval = p ± z × √p(1 - p)/n

= 0.36 ± 1.96 × √0.36 (1 - 0.36)/900

= 0.36 ± 1.96 ×√0.36 (0.64)/900

= 0.36 ± 1.96 × √0.000256

= 0.36 ± 1.96 × 0.016

= 0.36 ± 0.03136

Confidence Interval = 0.36 ± 0.03136

= 0.36 - 0.03136

= 0.32864

Approximately to 3 decimal places = 0.329

= 0.36 + 0.03136

= 0.39136

Approximately to 3 decimal places = 0.391

Therefore, the 95% confidence interval for the population proportion of people who believe the governor broke campaign financing laws = (0.329, 0.391)

7 0
3 years ago
1. A line passes through (9, -9) and (10,-5).
jenyasd209 [6]

Answer:

1. y+5=4x-40

2.y=4x-45

Step-by-step explanation:

To get the slope of a line you do y₂-y₁/x₂-x₁ so we plug in the values -9+5/9-10 and we get -4

Point-slope form states y-y₁=m(x-x₁) where m is the slope so plug in the values we get y+5=4(x-10) and you get y+5=4x-40 then turn this equation into y=mx+b and get y= 4x-45

5 0
3 years ago
Ngozi earns \$24{,}000$24,000dollar sign, 24, comma, 000 in salary in the first year she works as an interpreter. Each year, she
Mama L [17]

Answer:

The function that shows Ngozi's salary after t years is:

S(t) = 24000(1.035)^t

Step-by-step explanation:

Please see the attached file for details

5 0
3 years ago
4 + 3 x 7 − 1 = 42 put brackets
Ira Lisetskai [31]

Answer:

42

Step-by-step explanation:

(4 +3) ×(7-1) =

7 ×6 =

42

8 0
4 years ago
Read 2 more answers
OMG PLEASE HELP THIS IS DUE TODAY WILL GIVE BRAINLIEST 95 POINTS HELP ME HELP ME PLZZZZ HELP.
Sphinxa [80]

Answer:

Step-by-step explanation:

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Parallel lines are lines in a plane that are always the same distance apart. Parallel lines never intersect.

The slope of a line is a measure of its steepness.

A solution is an assignment of values to the unknown variables that makes the equality in the equation true.

Square Root a factor of a number that, when multiplied by itself, gives the original number

system of equations is a set or collection of equations that you deal with all together at once.

Variable  is standing in for an unknown numerical value in an equation.

The x-axis is the horizontal plane of a graph

The x-intercept is the point where a line crosses the x-axis.

The Y-axis is The line on a graph that runs vertically (up-down) through zero

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8 0
3 years ago
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