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3 years ago

HELP PLEASE? I can not understand this, and I would love the help if possible. 100pts given as well

Mathematics

1 answer:

maria [59]3 years ago

4 0

Answer:

I'm not quite sure about the first part (sorry), but from what I can tell, the interval estimates are like the margin of error and the percentages combined. So for example, the 35% that want to start school early have an interval estimate of 31%-39%, the 20 percent that like things as they are have an interval estimate of 16%-24% and so on.

For the second part, since there is a +- 4% margin of error, it is possible that the majority (39% that want to start later) can go down by 4% and the 35% that wanted to start earlier can go up by 4%. Therefore, taking into consideration margin or error, the people that want to get out of school earlier could be the majority and win.

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Brampton is 70 kn due east of Abbott. The bearing of Corwood from Abbott is 015 degrees and from Brampton is 290 degrees. Calcul

Mashcka [7]

I THINK YOU NEED OPEN MATH BOOK! ;)

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3 years ago

Inside the box of every cereal box contains a surprise gift. The store manager assures employees that 22 of the 45 boxes on the

kherson [118]

Answer:

0.2333 = 23.33% probability that both of them have the secret decoder ring

Step-by-step explanation:

The cereals are chosen without replacement, which means that the hypergeometric distribution is used to solve this question.

Hypergeometric distribution:

The probability of x successes is given by the following formula:

$P(X = x) = h(x,N,n,k) = \frac{C_{k,x}*C_{N-k,n-x}}{C_{N,n}}$

In which:

x is the number of successes.

N is the size of the population.

n is the size of the sample.

k is the total number of desired outcomes.

Combinations formula:

$C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

In this question:

45 boxes, which means that $N = 45$

22 have the secret decoder ring, which means that $k = 22$

Two boxes, which means that $n = 2$

What is the probability that both of them have the secret decoder ring?

This is P(X = 2). So

$P(X = x) = h(x,N,n,k) = \frac{C_{k,x}*C_{N-k,n-x}}{C_{N,n}}$

$P(X = 2) = h(2,45,2,22) = \frac{C_{22,2}*C_{23,0}}{C_{45,2}} = 0.2333$

0.2333 = 23.33% probability that both of them have the secret decoder ring

8 0

3 years ago

The height of an object t seconds after it is thrown from a height of h feet is modelled by the equation h(t) = -16t^2 + vt + h.

prisoha [69]

Answer:

At 0.713 second the ball will hit the ground

Step-by-step explanation:

The height of an object t seconds after it is thrown from a height of h feet is modeled by the equation:

$h(t) = -16t^2 + vt + h$

The ball is thrown from a point 6 feet above ground with an initial velocity, v, of 30 feet per second, equation becomes:

$h(t) = -16t^2 + 3t + 6$

It is required to find the time when the ball hits the ground. At that point, h(t) =0.

So,

$-16t^2 + 3t + 6=0$

Above is a quadratic equation, the value of time is given by :

t = -0.526 s and t = 0.713 seconds

So, at 0.713 second the ball will hit the ground.

4 0

3 years ago

Find the value of c that makes the trinomial a perfect square.

zmey [24]

Answer:b

Step-by-step explanation:

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3 years ago

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Trava [24]

Answer:

Step-by-step explanation:

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3 years ago