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lara [203]
3 years ago
6

what is the total area of the four walls of a rectangular room 12 ft long by 13 ft wide by 9 ft high?

Mathematics
2 answers:
Marina CMI [18]3 years ago
7 0

Answer:

your mom

i dunno what else to put here lol

gizmo_the_mogwai [7]3 years ago
3 0

Answer:

Total area of four walls is 450ft

Step-by-step explanation:

First to find area of one wall is lenghth times height 2(12 x 9)

Second to find the area of the two other walls it’s height times width 2(13 x 9)

third add then up and you get 450

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6.8 Use the Normal approximation. Suppose we toss a fair coin 100 times. Use the Normal approximation to find the probability th
Maru [420]

Answer:

(a) The probability that proportion of heads is between 0.30 and 0.70 is 1.

(b) The probability that proportion of heads is between 0.40 and 0.65 is 0.9759.

Step-by-step explanation:

Let <em>X</em> = number of heads.

The probability that a head occurs in a toss of a coin is, <em>p</em> = 0.50.

The coin was tossed <em>n</em> = 100 times.

A random toss's result is independent of the other tosses.

The random variable <em>X</em> follows a Binomial distribution with parameters n = 100 and <em>p</em> = 0.50.

But the sample selected is too large and the probability of success is 0.50.

So a Normal approximation to binomial can be applied to approximate the distribution of \hat p<em> </em>(sample proportion of <em>X</em>) if the following conditions are satisfied:

  1. np ≥ 10
  2. n(1 - p) ≥ 10

Check the conditions as follows:

 np=100\times 0.50=50>10\\n(1-p)=100\times (1-0.50)=50>10

Thus, a Normal approximation to binomial can be applied.

So,  \hat p\sim N(p,\ \frac{p(1-p)}{n})

\mu_{p}=p=0.50\\\sigma_{p}=\sqrt{\frac{p(1-p)}{n}}=0.05

(a)

Compute the probability that proportion of heads is between 0.30 and 0.70 as follows:

P(0.30

                              =P(-4

Thus, the probability that proportion of heads is between 0.30 and 0.70 is 1.

(b)

Compute the probability that proportion of heads is between 0.40 and 0.65 as follows:

P(0.40

                              =P(-2

Thus, the probability that proportion of heads is between 0.40 and 0.65 is 0.9759.

6 0
3 years ago
Which number sentence is true? A. –7 + 10 = –3 B. –7 – (–10) = –17 C. 7 – 10 = 3 D. 7 – (–10) = 17
Mice21 [21]

Assignment: \bold{Which \ Statement \ Is \ True}

<><><><><>

Answer: \boxed{\bold{7-\left(-10\right)}}

<><><><><>

Explanation: \downarrow\downarrow\downarrow

<><><><><>

Note: \bold{Solve \ Equation \ To \ Find \ Answer}

[ Step One ] Apply Rule - (-a) = a

\bold{7+10}

[ Step Two ] Add

\bold{17}

<><><><><><><>

\bold{\rightarrow Rhythm \ Bot \leftarrow}

3 0
3 years ago
Read 2 more answers
Solve the system of equations.<br><br> y=3x<br> y=x^2-10
puteri [66]

Answer:

y=3x.........1

y=x^2-10.......2

substituting value of eq 1 to 2

3x=x^2-10

x^2-10-3x=0

x^2-3x-10=0

x^2-5x+2x-10=0

X(x-5)+2(x-5)=0

(x-5)(X+2)=0

then

X=5 or X=-2

again

y=??

when X=5

y=3×5=15

when X=-2

y=-6

5 0
3 years ago
Read 2 more answers
Samaria has 6 more than three times as many pieces of candy as sydney. samaria has 36 pieces of candy. how many does sydney have
lesya [120]

For this case we have:

x: Number of candies that Sydney has

The equation to find the amount of Sydney sweets is given by:

3x + 6 = 36

We want to clear x:

3x = 36-63x = 30

x = \frac{30}{3}

x = 10

So, Sydney has 10 candies

Answer:

Sydney has 10 candies


4 0
3 years ago
Read 2 more answers
Which of the following is a primary responsibility of the Federal Reserve Bank?
Ainat [17]
Its either A or C....
7 0
3 years ago
Read 2 more answers
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