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3 years ago

14

if the total precipitation (rainfall and snow) for the year at a mountain town is expected to be 37.9 and it has already rained

26.82 inches, how many more inches of precipitation are excepted?

1 answer:

zimovet [89]3 years ago

3 0

Answer:

11.08 inches of precipitation expected.

Step-by-step explanation:

subtract 37.9 by 26.82 since you want to know how much precipitation is left.

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How would you correctly write the equation 4(10+5)=6(12-2) using the distributive property?

slamgirl [31]

the correct answer is 45=70

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3 years ago

I need this for a test; help asap

weqwewe [10]

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Step-by-step explanation:

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3 years ago

The comprehensive strength of concrete is normally distributed with μ = 2500 psi and σ = 50 psi. Find the probability that a ran

VARVARA [1.3K]

Answer:

The probability that the diameter falls in the interval from 2499 psi to 2510 psi is 0.00798.

Step-by-step explanation:

Let's define the random variable, $X =$ "Comprehensive strength of concrete". We have information that $X$ is normally distributed with a mean of 2500 psi and a standard deviation of 50 psi (or a variance of 2500 psi). In other words, $X \sim N(2500, 2500)$ .

We want to know the probability of the mean of X or $\bar{X}$ that falls in the interval $[2499;2510]$ . From inference theory we know that :

$\bar{X} \sim N(2500, \frac{2500}{5}) \Rightarrow \bar{X} \sim N(2500,500)$

Now we can find the probability as follows:

$P(2499 \leq \bar{X} \leq 2510) \Rightarrow P(\frac{2499 - 2500}{500} \leq \frac{\bar{X} - 2500}{500} \leq \frac{2499 - 2500}{500} ) \Rightarrow\\\Rightarrow P(-0.002 \leq \frac{\bar{X} - 2500}{500} \leq 0.02 ) \Rightarrow P(-0.002 \leq Z \leq 0.02 )$

Where $Z \sim N(0,1)$ , then:

$P(-0.002 \leq Z \leq 0.02 ) \approx P(0 \leq Z \leq 0.02 ) = P(Z \leq 0.02 ) - P(Z \leq 0) \\P(0 \leq Z \leq 0.02 ) = 0.50798 - 0.5 = 0.00798$

8 0

4 years ago

-3(-6u+6)-3u=5(u-2)-3

riadik2000 [5.3K]

Answer:

u=1/2

Step-by-step explanation:

-3(-6u+6)-3u=5(u-2)-3

18u-18-3u=5u-10-3

15u-18=5u-13

15u-5u-18=-13

10u-18=-13

10u=-13+18

10u=5

u=5/10

simplify

u=1/2

5 0

3 years ago

Hi! Can you please help me and explain?

vazorg [7]

Divide it into 1 rectangle and 3 triangles.

Rectangle : 3 x 8 = 24

Triangle 1: 1/2 x 8 x 2 = 8

Triangle 2: 1/2 x 4x3 = 6

Triangle 3: 1/2 x 4x3= 6

Total area = 24 + 8 + 6 + 6 = 44 square units.

7 0

3 years ago