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Zina [86]
3 years ago
6

A consumer electronics company is comparing the brightness of two different types of picture tubes for use in its television set

s. Tube type A has mean brightness of 100 and standard deviation of 16, and tube type B has unknown mean brightness, but the standard deviation is assumed to be iden- tical to that for type A. A random sample of n = 25 tubes of each type is selected, and XB - Xis computed. If us equals or exceeds ua, the manufacturer would like to adopt type B for use. The observed difference is XB - XA = 3.5. What decis would you make, and why?

Mathematics
1 answer:
maw [93]3 years ago
5 0

Answer:

________________________________________________

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At the end of a recent WNBA regular season, the Phoenix murmur had 12 more victories than losses. The number of victories they h
Hoochie [10]

Answer:

34 games


Step-by-step explanation:

let the number of losses be  l

let the number of victories be  v


<u>the Phoenix murmur had 12 more victories than losses:</u>

v=l+12

<u>The number of victories they had was one more than two times the number of losses:</u>

v=2l+1


<em>We have 2 expressions for v, equating these 2, we can solve for l:</em>

l+12=2l+1\\12-1=2l-l\\11=l

So 11 games, they lost.

Using this value, we can plug into the 1st equation to solve for v:

v=l+12\\v=11+12\\v=23

So 23 games, they won.


Given that no draws, they played a total of 23 + 11 = 34 games this season

6 0
3 years ago
What is the area of the composite figure whose vertices have the following coordinates? (−2, −2) , (3, −2) , (5, −4) , (1, −8) ,
Luden [163]
Check the picture below.

notice the composite is just,

a 5x2 rectangle.

a triangle(yellow) with a base of 2 and a height of 2.

a triangle(red) with a base of 6 and a height of 4.

get the area of each, sum them up, and that's the area of the composite.

\bf \stackrel{rectangle}{(5\cdot 2)}~~~~+~~~~\stackrel{yellow~triangle}{\cfrac{1}{2}(2)(2)}~~~~+~~~~\stackrel{red~triangle}{\cfrac{1}{2}(6)(4)}

3 0
3 years ago
Out of a class of 30 students, 24 were in class on Thursday. What percent were in class
snow_lady [41]

Answer:

24/30 = 0.8

0.8x100 = 80

Answer = 80%

8 0
3 years ago
Read 2 more answers
SOLVE QUICK PLEASE!! 20 POINTS
PolarNik [594]

Answer:

SA = 384 in²

Step-by-step explanation:

Assuming we're finding surface area:

SA of top of large cube: 8(8) - 4(4) = 48 in²

SA of sides of large cube: 4(8)(8) = 256 in²

SA of exposed faces of small cube: 5(4)(4) = 80 in²

Total = 48 + 256 + 80 = 384 = ∑SA

6 0
3 years ago
Solve x square − 10 x + 35 by completing the square.
Doss [256]

Answer: X=0.28571428571

Step-by-step explanation:

-10x divide by 10 =x , -10 divide by 35=0.28571428571

7 0
3 years ago
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