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3 years ago

No no n o no n o n o n o n o a

Mathematics

1 answer:

WARRIOR [948]3 years ago

8 0

Step-by-step explanation:

what? but 2×2 =4 but uhh, just a random fact. if you need help just ask me stranger from the internet

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Which of the following numbers is between - 3/4 and 5/8?

SVETLANKA909090 [29]

Answer:

The correct answer is B.

Step-by-step explanation:

If you place all of them on a number line the order from least to greatest would be:

-1, -3/4, -1/2, 5/8, 7/8, 0.9

5 0

3 years ago

A real estate agent has 14 properties that she shows. She feels that there is a 50% chance of selling any one property during a

Ratling [72]

Answer:

91.02% probability of selling more than 4 properties in one week.

Step-by-step explanation:

For each property, there are only two possible outcomes. Either it is sold, or it is not. The chance of selling any one property is independent of selling another property. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

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

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

And p is the probability of X happening.

In this problem we have that:

$n = 14, p = 0.5$

Compute the probability of selling more than 4 properties in one week.

Either you sell 4 or less properties in one week, or you sell more. The sum of the probabilities of these events is decimal 1. So

$P(X \leq 4) + P(X > 4) = 1$

We want to find $P(X > 4)$ . So

$P(X > 4) = 1 - P(X \leq 4)$

In which

$P(X \leq 4) = P(X = 0) + P(X = 1) + P(X = 2) + P(X = 3) + P(X = 4)$

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

$P(X = 0) = C_{14,0}.(0.5)^{0}.(0.5)^{14} = 0.000061$

$P(X = 1) = C_{14,1}.(0.5)^{1}.(0.5)^{13} = 0.000854$

$P(X = 2) = C_{14,2}.(0.5)^{2}.(0.5)^{12} = 0.0056$

$P(X = 3) = C_{14,3}.(0.5)^{3}.(0.5)^{11} = 0.0222$

$P(X = 4) = C_{14,4}.(0.5)^{4}.(0.5)^{10} = 0.0611$

$P(X \leq 4) = P(X = 0) + P(X = 1) + P(X = 2) + P(X = 3) + P(X = 4) = 0.000061 + 0.000854 + 0.0056 + 0.0222 + 0.0611 = 0.0898$

Finally

$P(X > 4) = 1 - P(X \leq 4) = 1 - 0.0898 = 0.9102$

91.02% probability of selling more than 4 properties in one week.

8 0

3 years ago

A ball is thrown straight up from the roof of an 80-foot building and it's height is modeled by the h(t) = â17t2 + 68t + 80, whe

Rasek [7]

Answer:

t = 4

Step-by-step explanation:

Given that:

$h(t) = 17t^2 + 68t + 80$

When h(t) = 80, we have that:

$80 = -17t^2 + 68t + 80\\\\=> 0 = -17t^2 + 68t\\\\=> 17t^2 - 68t= 0\\\\=> 17t(t - 4) = 0\\\\=> t = 0, t = 4\\\\$

t = 0 represents when the ball has not been thrown at all, in its initial position.

t = 4 represents the time taken for the ball to hit the roof of the building on its way down.

Hence, our answer is t = 4. (t is in secs)

7 0

3 years ago

Read 2 more answers

Thor and Zeus strike with their hammers. The higher they raise their hammers before they strike, the louder the sound of the str

Ulleksa [173]

Answer:

The first part is C) The increase in loudness per centimeter is the same for both

The second part is A) Thor's

Step-by-step explanation:

First part:

Whose loudness increases more per additional centimeter of height?

C) The increase in loudness per centimeter is the same for both

Second part:

Whose strike is louder when he strikes from a height of 40 centimeters?

A) Thor's

I did it on Khan and it was correct.

5 0

4 years ago

Read 2 more answers

Triangle ABC is similar to Triangle XYZ. Solve for x and y

Pie

Yz =5
Xz= 7
Hope this helps!!!

6 0

3 years ago