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4 years ago

Need help plz thank you

Mathematics

1 answer:

Vika [28.1K]4 years ago

3 0

Its B don't thx me

I hope I help

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100 students are interviewed to see which of biology, chemistry or physics they prefer.

Sedbober [7]

65.45%

Mark brainliest please

Hope this helps you

6 0

3 years ago

From a point p on level ground, the angle of elevation of the top of a tree is 60°. If the tree is 39m high, how far is its base

zzz [600]

Hello,

tan 60°=√3
d/39=tan 60°==>d=39/√3=39√3/3=13√3=22,516660498... (m)

5 0

4 years ago

Need the answer please answer my question

meriva

Answer:

166.336 Cubic Centimeters

Step-by-step explanation:

Volume is calculated by L x W x H

11.3 x 4.6 x 3.2 is 166.336

3 0

3 years ago

Suppose that the pH of soil samples taken from a certain geographic region is normally distributed with a mean pH of 7 and a sta

Otrada [13]

Answer:

a) P=0

b) P=1

c) P=0

d) X=7.1645

Step-by-step explanation:

We have the pH of soil for some region being normally distributed, with mean = 7 and standard deviation of 0.10.

a) What is the probability that the resulting pH is between 5.90 and 6.15?

We calculate the z-score for this 2 values, and then compute the probability.

$z_1=(X_1-\mu)/\sigma=(5.9-7.0)/0.1=-11\\\\z_2=(X_2-\mu)/\sigma=(6.15-7)/0.1=-8.5$

Then the probability is

$P(5.90$

b) What is the probability that the resulting pH exceeds 6.10?

We repeat the previous procedure.

$z=(6.10-7)/0.1=-9\\\\P(x>6.1)=P(z>-9)=1$

c) What is the probability that the resulting pH is at most 5.95?

$z=(5.95-7)/0.1=-10.5\\\\P(x$

d. What value will be exceeded by only 5% of all such pH values?

We have to calculate the value of pH for which only 5% is expected to be higher. This can be represented as P(X>x)=0.05.

In the standard normal distribution, it happens for a z=1.645.

$P(z>1.645)=0.05$

Then, we can calculate the pH as:

$x=\mu+z\sigma=7.0+1.645*0.1=7.0+0.1645=7.1645$

4 0

3 years ago

(1+5²) –16 (1/2)³<br><br>Please help please and Thank you

KIM [24]

Answer:

the answer simplified is 24

Step-by-step explanation:

4 0

2 years ago