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3 years ago

I WILL GIVE 44 POINT PLEASE HELP!!!!!

Mathematics

2 answers:

Nina [5.8K]3 years ago

8 0

$|\Omega|=50\\ |A|=26\\\\ P(A)=\dfrac{26}{50}$

natali 33 [55]3 years ago

5 0

Answer:

Step-by-step explanation:

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Silicon wafers are scored and then broken into the many small microchips that will he mounted into circuits. Two breaking method

antoniya [11.8K]

Answer:

The estimate is $- 0.0265\le K \le 0.0465$

Method B this is because the faulty breaks are less

Step-by-step explanation:

The number of microchips broken in method A is $n_1 = 400$

The number of faulty breaks of method A is $X_1 = 32$

The number of microchips broken in method B is $n_2 = 400$

The number of faulty breaks of method A is $X_2 = 32$

The proportion of the faulty breaks to the total breaks in method A is

$p_1 = \frac{32}{400}$

$p_1 = 0.08$

The proportion of the faulty to the total breaks in method B is

$p_2 = \frac{28}{400}$

$p_2 = 0.07$

For this estimation the standard error is

$SE = \sqrt{ \frac{p_1 (1 - p_1)}{n_1} + \frac{p_2 (1- p_2 )}{n_2} } }$

substituting values

$SE = \sqrt{ \frac{0.08 (1 - 0.08)}{400} + \frac{0.07 (1- 0.07 )}{400} } }$

$SE = 0.0186$

The z-values of confidence coefficient of 0.95 from the z-table is

$z_{0.95} = 1.96$

The difference between proportions of improperly broken microchips for the two breaking methods is mathematically represented as

$K = [p_1 - p_2 ] \pm z_{0.95} * SE$

substituting values

$K = [0.08 - 0.07 ] \pm 1.96 *0.0186$

$K = - 0.0265 \ or \ K = 0.0465$

The interval of the difference between proportions of improperly broken microchips for the two breaking methods is

$- 0.0265\le K \le 0.0465$

3 0

3 years ago

If a 12 ounce box of cereal costs $3.84, how many ounces should be in a box marked $2.49?

Ivan

Answer:

7.78 ounces

Step-by-step explanation:

We know that:

12 ounce box of cereal = $3.84

Work:

12/3.84 ounce box of cereal = $1
=> 12/3.84 x 2.49 box of cereal = $2.49
=> 7.78 ounces (Rounded to nearest hundredth) = $2.49

Hence, 7.78 ounces cost $2.49.

6 0

3 years ago

Read 2 more answers

the mean of a distribution is 276 while the median is 231. which of these statements is likely to be true about the distribution

Verizon [17]

Answer:

Step-by-step explanation:Given that the mean distribution is 217, and the median is 291. This follows that given 217<291, it implies that most of the values lie to the left of the center of the distribution, hence the distribution will be positively skewed.

Hence,

the answer is:

b.) it is positively skewed

8 0

3 years ago

In triangle PQR, find the measure of angle Q. P= 64 degrees Q= X R= 2x

gizmo_the_mogwai [7]

Answer:

38.667°

Step-by-step explanation:

the total sum of 3 angles in a triangle is 180

in triangle PQR this means:

P+Q+R = 180

so:

64+x+2x=180

64+3x=180

3x=116

x=116/3=38.667

So Q=X=38.667

4 0

2 years ago

Apply the distributive property to produce an equivalent expression to 10(9+8t

Ket [755]

10(9+8t)
10x9+10x8t
90+8t
hope that helps

5 0

3 years ago