3 years ago

Help please fast please

Mathematics

2 answers:

Ray Of Light [21]3 years ago

5 0

Answer:

Step-by-step explanation:

I got 91.1 for both of them

andriy [413]3 years ago

4 0

Answer:

Step-by-step explanation:

9.81 is the same as 9.8100

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Suppose the force acting on a column that helps to support a building is a normally distributed random variable X with mean valu

Sauron [17]

Answer:

(1) 0.4207

(2) 0.7799

Step-by-step explanation:

Given,

Mean value,

$\mu = 15.0$

Standard deviation,

$\sigma = 1.25$

(1) P(X ≥ 17.5) = 1 - P( X ≤ 17.5)

$= 1- P(\frac{x-\mu}{\sigma} \leq \frac{17.5-\mu}{\sigma})$

$=1-P(z\leq \frac{17.5 - 15}{1.25})$

$=1-P(z\leq \frac{2.5}{1.25})$

$=1-P(z\leq 2)$

$=1- 0.5793$ ( By using z-score table )

= 0.4207

(2) P(14 ≤ X ≤ 18) = P(X ≤ 18) - P(X ≤ 14)

$=P(z\leq \frac{18 - 15}{1.25}) - P(z\leq \frac{14 - 15}{1.25})$

$=P(z\leq \frac{3}{1.25}) - P(z\leq -\frac{1}{1.25})$

$=P(z\leq 2.4) - P(z\leq -0.8)$

= 0.9918 - 0.2119

= 0.7799

8 0

3 years ago

NEGATIVE EXPONENTS - All of the following expressions are equal except _____.

Naily [24]

Answer: Choice (3): $\frac{1}{27}$

$x^{-3}=\frac{1}{x^3}\\x=3\rightarrow x^3 = 3^3 = 27\rightarrow \frac{1}{x^3}=\frac{1}{27}$

Remember that negative power is the same as reciprocal if the same magnitude power but positive.

6 0

3 years ago

True or false, 2:5 is an equivalent ratio to 15:75?

Alex17521 [72]

Answer:

False

Step-by-step explanation:

15 is 3 times 2 while 75 is 15 times 5

7 0

2 years ago

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John travels 180 mile in 6 hours. How far will he travel in 10 hours?

ella [17]

In 10 hours John will travel 300 miles

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4 years ago

A classroom is arranged with 6 seats in the front row, 12 seats in the middle row, and 10 seats in the back row. The teacher ran

alukav5142 [94]

Answer:

4/15 i'm pretty sure

(Sorry if it's wrong, it's been awhile since i've done stuff like this)

8 0

3 years ago