3 years ago

I

Mathematics

1 answer:

raketka [301]3 years ago

3 0

Answer:

um it there and other number?

Step-by-step explanation:

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The results of a survey indicate 50% of seventh-graders watch at least one movie

Kay [80]

Answer:

25 students

Step-by-step explanation:

50% of 50 is 25

50/2 = 25

7 0

3 years ago

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Who had this before if so can I get help

telo118 [61]

2*3+4=10

5+2x2=9

4-3+2=3

4*3+2=14

20-4x3+6=14

16-30/2+11=12

24/6*5=20

15/5+2=5

2+2*9-5=15

12-3+4*2=1

12/3+3*4=16

9-6/3=7

16-3*4=4

36/4/9=1

The last one is yours

6 0

3 years ago

The burning time of a very large candle is normally distributed with mean of 2500 hours and standard deviation of 20 hours. Find

dezoksy [38]

Answer: C.-1.5

Step-by-step explanation:

Given: The burning time of a very large candle is normally distributed with mean $(\mu)$ of 2500 hours and standard deviation $(\sigma)$ of 20 hours.

Let X be a random variable that represent the burning time of a very large candle.

Formula: $Z=\dfrac{X-\mu}{\sigma}$

For X = 2470

$Z=\dfrac{2470-2500}{20}\\\\\Rightarrow\ Z=\dfrac{-30}{20}\\\\\Rightarrow\ Z=\dfrac{-3}{2}\\\\\Rightarrow\ Z=-1.5$

So, the z-score they corresponds to a lifespan of 2470 hours. =-1.5

Hence, the correct option is C.-1.5.

7 0

2 years ago

Pls help i will mark brainlyest

Sergeeva-Olga [200]

Answer:

∠b=82°

Step-by-step explanation:

143°=∠c+∠b (exterior angle property)

143°=61°+∠b

∠b=143-61

∠b=82°

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2 years ago

DUE TODAY! GIVING BRANLIEST!!!

Rina8888 [55]

Answer:

it b

Step-by-step explanation:

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2 years ago

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