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Ray Of Light [21]

3 years ago

12

Given a normal distribution with a mean of 128 and a standard deviation of 15, what percentage of values is with an interval 83

to 173?
A.32%
B.50%
C.68%
D.95%
E.99.7%

Brainiest and 90+ points!

1 answer:

max2010maxim [7]3 years ago

3 0

Answer:C. 68%

Step-by-step explanation:

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There are nine water bottles in a fridge. Three full boxes are added. Two more boxes are added, both of which have one fewer bot

Degger [83]

The number of bottles in a full box is 12.

<u><em>Explanation</em></u>

Suppose, the number of bottles in a full box is $x$

So, the number of bottles in <u>three</u> full boxes $=3x$

Now, two more boxes are added, both of which have <u>one fewer bottle than the other three</u>. So, the number of bottles in these two boxes $= 2(x-1)$

As there were 9 bottles initially and now there are 67 bottles in the fridge, <em><u>so the equation will be</u></em>....

$9+3x+2(x-1)=67\\ \\ 9+3x+2x-2=67\\ \\ 5x+7=67\\ \\ 5x=67-7\\ \\ 5x=60\\ \\ x=\frac{60}{5}=12$

Thus, the number of bottles in a full box is 12.

7 0

3 years ago

Go to a clothing store with

olga2289 [7]

Answer:

original price $75

discount $18.75

sale price $56.25

Step-by-step explanation:

I found a pair of dress pants for $75.

Since the discount is 25%, then the discount is

25% of $75 = 0.25 × $75 = $18.75

The sale price is the original price, $75, minus the discount, $18.75.

$75 - $18.75 = $56.25

5 0

2 years ago

Seven cards are drawn from an ordinary deck. In how many ways is it possible to draw (b) only 8's, 's and (c) no 's, 's an

elena-14-01-66 [18.8K]

Complete question :

Seven cards are drawn from an ordinary deck. In how mnat ways is it possible to draw (a) only 5s (b)only 8s, 9s, and 10s, (c) no 8s, 9s, and 10s (d) exactly 2 jacks or kings, (e) 5 spades and 2 hearts?

Answer:

0; 792 ; 100396 ; 30408224 ; 18643560 ;

Step-by-step explanation:

Number of cards in a deck = 52

Number of cards to be drawn = 7

Using combination:

nCr = n! ÷ (n-r)!r!

A.)

Number of 5's in a deck = 4

4C7 = 0

(B.)

only 8s, 9s, and 10s,

Number of 8, 9 and 10's = 4 *3 = 12

12C7 = 12! ÷ 5!7! = 792

(C)

no 8s, 9s, and 10s ;

Number of cards to select from = 52 - (3(4)) = 40C7 = 18643560

(D)

exactly 2 jacks or kings,

Number of jack or king in deck = 8 ; other 5 could be any of the rest : (52 - 8) = 44

8C2 * 44C5 = 28 * 1086008 = 30408224

(e) 5 spades and 2 hearts?

Number of spades = 13

Number of hearts = 13

13C5 * 13C2

1287 * 78 = 100396

4 0

3 years ago

Tim owns a sporting goods store. Is each situation linear?

eimsori [14]

The answer is :
1. Yes,
2. Yes,
3. No,
4. Yes,

3 0

3 years ago

Read 2 more answers

Ronaldo is buying new carpet for his living room. The length of the living room is 20 1/2 feet. The room is half as wide as it i

sergejj [24]

Answer:

210 1/8 ft²

Step-by-step explanation:

The length of the living room is 20 1/2

the width is half as long as the length

(20 1/2)/2=10 1/4

so the width is 10 1/4

A=LW so

A=(10 1/4)(20 1/2)

So A=

210 1/8 ft²

6 0

3 years ago