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Vanyuwa [196]
3 years ago
11

ASAP please

Mathematics
1 answer:
kherson [118]3 years ago
4 0

Since it's normally distributed, we can apply the emperical rule. The middle 95% will be within two standard deviations of the mean, so that means:

18-2(1.5), 18+2(1.5)=15,21

So we want the first option.

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Anybody Know This. ?
PolarNik [594]

Answer:

3-Equalateral

Step-by-step explanation:

All the sides are all equal, which basically eliminates isosceles, isosceles acute, and scalene, therefore the answer is Equalateral.

5 0
3 years ago
The midpoint of AB is M(0,2). If the
otez555 [7]

Answer:

Step-by-step explanation:

(x+2)/2 = 0

x + 2 = 0

x = -2

(y - 3)/2 = 2

y - 3 = 4

y = 7

(-2, 7)

8 0
3 years ago
Distributive/ like terms<br> Pre-Alegbra<br> Overdue!!
il63 [147K]

HI!

Here are the answers:

1) x=39/7 or 5.57

2) x=1

3) y=42

4) c=9

I hope this helps!

Feel free to mark brainliest!

If you have any other questions, don't hesitate to let me know!

3 0
2 years ago
Read 2 more answers
Stacy uses a spinner with six equal sections numbered 2, 2, 3, 4, 5, and 6 to play a game. Write a probability model for this ex
allsm [11]

Answer:

We estimate to have 8.33 times the number 6 in 50 trials.

Step-by-step explanation:

Let us consider a success to get a 6. In this case, note that the probability of having a 6 in one spin is 1/6. We can consider the number of 6's in 50 spins to be a binomial random variable. Then, let X to be the number of trials we get a 6 out of 50 trials. Then, we have the following model.

P(X=k) = \binom{50}{k}(\frac{1}{6})^k(\frac{5}{6})^{50-k}

We will estimate the number of times that she spins a 6 as the expected value of this random variable.

Recall that if we have X as a binomial random variable of n trials with a probability of success of p, then it's expected value is np.

Then , in this case, with n=50 and p=1/6 we expect to have \frac{50}{6} number of times of having a 6, which is 8.33.

6 0
3 years ago
Read 2 more answers
Find the work done in emptying a cylindrical tank filled with water. The water is being pumped out from the 6 top. The tank has
lutik1710 [3]

Answer:

<em>908360.67 lb-ft</em>

<em></em>

Step-by-step explanation:

height of tank= 6 ft

diameter of the tank = 4 ft

density of water p = 62.4 lbs/ft

A is the cross sectional area of the tank

A = \pi r^{2}

where r = diameter/2 =  4/2 = 2 ft

A = 3.142 x 2^{2} = 12.568 ft^2

work done = force x distance through which force is moved

work = F x d

Force  due to the water = pgAh

where g = acceleration due to gravity = 32.174 ft/s^2

Force  = 62.4 x 32.174 x 12.568 x 6 =  151393.44 lb

work done = force x distance moved

work = 151393.44 x 6 = <em>908360.67 lb-ft</em>

8 0
2 years ago
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