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solong [7]
4 years ago
6

Polynomials -5x^2(6x − 1) ASAP will mark brainliest

Mathematics
2 answers:
pashok25 [27]4 years ago
7 0

Answer:

The answer would be 30ASx³ + 5ASx²

Step-by-step explanation:

Semmy [17]4 years ago
4 0

Answer:

-30x^3 + 5x^2 is the monomial times the binomial

Step-by-step explanation:

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4 0
4 years ago
Kim wants to determine a 90 percent confidence interval for the true proportion of high school students in the area who attend t
PolarNik [594]

Answer:

We need a sample of at least 752 students.

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:

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

90% confidence level

So \alpha = 0.1, z is the value of Z that has a pvalue of 1 - \frac{0.1}{2} = 0.95, so Z = 1.645.

How large of a sample must she have to get a margin of error less than 0.03

We need a sample of at least n students.

n is found when M = 0.03.

We have no information about the true proportion, so we use \pi = 0.5.

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

0.03 = 1.645\sqrt{\frac{0.5*0.5}{n}}

0.03\sqrt{n} = 1.645*0.5

\sqrt{n} = \frac{1.645*0.5}{0.03}

(\sqrt{n})^{2} = (\frac{1.645*0.5}{0.03})^{2}

n = 751.67

Rounding up

We need a sample of at least 752 students.

6 0
4 years ago
From a distance of 42 feet from the base of a building, the angle of elevation to the top of the building is 67 Estimate the hei
mamaluj [8]
Because the problem represents right angle we can use simple geometric functions to determine size of sides of triangle and its angles if needed.

Since we have angle at point that is 42 feets away from base of the building and we need lenght of side that is oposite from that angle that means that we need some trigonometric function that includes those 2 sides.

that function is tangens.
tan67 = oposite side/side next to angle

tan67 = x/42
x = 42*tan67
x = 98.94 feet

Answer is D 99 feet
5 0
3 years ago
Problem 1.9. Find the relative ertrema of the following function. Determine whether each
Igoryamba

Answer:

Min: 0

Max: 0.125

Step-by-step explanation:

\frac{d}{dx} \frac{x^2}{x^4+16} =0\\\frac{-(2x)(x^4-16)}{(x^4+16)^2} =0\\x=0, 2, -2\\f(0)=0\\f(2)=f(-2)=0.125\\\frac{d^2}{dx^2} f(x)=\frac{6x^8-384x^4+512}{(16+x^4)^3} \\f''(0)=0.125>0\\f''(2)=f''(-2)=-0.125

Min: 0

Max: 0.125

6 0
4 years ago
A contestant on a game show has 60 points. She answers a question correctly to win 30 points. The she
Grace [21]

Answer:

30+15=45

45-25=20

The contestants final score is 20

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
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