3 years ago

Help me please!!!!!!!!

Mathematics

1 answer:

Romashka [77]3 years ago

8 0

A and D is the answers

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After a tropical storm in a certain state, news reports indicated that 19 percent of households in the state lost power during t

olya-2409 [2.1K]

Answer:

H0:p=0.19

Ha:p>0.19

Step-by-step explanation:

7 0

3 years ago

How do you this. Explain if you can so I can learn thx

12345 [234]

Answer:

2 seconds

Step-by-step explanation:

Given

h = - 32t² + 64t

When the frisbee lands the height h = 0, that is

- 32t² + 64t = 0 ( multiply through by - 1 )

32t² - 64t = 0 ← factor out 32t from each term

32t(t - 2) = 0

Equate each factor to zero and solve for t

32t = 0 ⇒ t = 0

t - 2 = 0 ⇒ t = 2

t = 0 represents when the frisbee was thrown

and t = 2 when it lands

Hence it takes 2 seconds for the frisbee to land.

7 0

3 years ago

Some electronic devices are better used than new: the failure rate is higher when they are new than when they are six months old

Reptile [31]

Given that half of the personal music players sold by a particular brand have a flaw. If the player has the flaw, it dies in the first six months. If it does not have this flaw, then only 20% fail in the first six months.
Let A be the event that it fails in I 6 months
B1 = it has a flaw
B2 = it does not have a flaw
B1 and B2 are mutually exclusive and exhaustive
the chances that it has this flaw
=The probability that it has the flaw is