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2 years ago

Find the measure of the arc or central angle indicated. Assume that lines which appear to be

Mathematics

1 answer:

9966 [12]2 years ago

4 0

Answer:

310°

Step-by-step explanation:

$m\overset{\frown}{DBC} = m\overset{\frown}{DB} + m\overset{\frown}{BC} = 180^\circ + 130^\circ = 310^\circ$

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A survey showed that 77% of adults need correction (eyeglasses, contacts, surgery, etc.) for their eyesight. If 22 adults are

Sveta_85 [38]

Answer:

The probability that no more than more than 11 of them need correction for their eyesight is 0.00512

No, 11 is not a significantly low low number of adults requiring eyesight correction .

Step-by-step explanation:

A survey showed that 77% of adults need correction for their eyesight.

If 22 adults are randomly selected, find the probability that no more than more than 11 of them need correction for their eyesight.

n =22

p = 0.77

q = 1-p = 1- 0.77=0.23

We are supposed to find $P(x\leq 11)$

$P(x\leq 11)=P(x=1)+P(x=2)+P(x=3)+.....+P(x=11)$

Formula : $P(x=r)=^nC_r p^r q^{n-r}$

$P(x\leq 11)=^{22}C_1 (0.77)^1 (0.23)^{22-1}+^{22}C_2 (0.77)^2 (0.23)^{22-2}+^{22}C_3 (0.77)^1 (0.23)^{22-3}+.....+^{22}C_{11} (0.77)^1 (0.23)^{22-11}$

Using calculator

$P(x\leq 11)=0.00512$

So, The probability that no more than more than 11 of them need correction for their eyesight is 0.00512

No, 11 is not a significantly low low number of adults requiring eyesight correction .

3 0

2 years ago

A coin is flipped 4 times. what is the probability of the coin landing on tails all 4 times

DaniilM [7]

Half the chance of landing tail once(1/2)

Half the chance of land tails four times (1/2 of 1/2 of 1/2 of 1/2)

1/16

6 0

2 years ago

Read 2 more answers

Frank's been traveling a lot lately as part of his job. During the past 30 days, he's been out of town 18 days. What fraction re

siniylev [52]

Answer:

18/30

Step-by-step explanation:

He has been out of town 18 out of the 30 days. You can simplify this to 6/10.

3 0

2 years ago

Can someone help me with this?!

cupoosta [38]

Sub in the numbers
2(5)^2 - 4(5) + 5
=50 - 20 + 5
=30 + 5
=35

5 0

2 years ago

A line with a slope of 10 passes through the points (9,-6) and (10,p) what is the value of p?

Simora [160]

Answer:

p = 16

Let me know if I'm wrong!

6 0

2 years ago