Can you help me with this answer

Mathematics

1 answer:

Alona [7]2 years ago

8 0

Answer:

169 (second choice)

Step-by-step explanation:

$13 [6^2 / (5^2-4^2) + 9]$

$13 [6^2 / (25 - 16) + 9]$

$13 [6^2 / 9 + 9]$

13 [36 / 9 + 9]

13 [4 + 9]

13 [13]

169

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Assume c and d function independently. for the system to function, either c or d must function.

almond37 [142]

For the "system" to function, we require that $C\cup D$ occurs (i.e. the event that either $C$ or $D$ function properly). This occurs with probability

$\mathbb P(C\cup D)=\mathbb P(C)+\mathbb P(D)-\mathbb P(C\cap D)$

but since $C$ and $D$ are independent,

$\mathbb P(C\cup D)=\mathbb P(C)+\mathbb P(D)-\mathbb P(C)\mathbb P(D)$

We're given that $\mathbb P(C^C)=0.08$ and $\mathbb P(D^C)=0.12$ , so

$\mathbb P(C\cup D)=(1-0.08)+(1-0.12)-(1-0.08)(1-0.12)=0.9904$

If $\mathbb P(C^C)=\mathbb P(D^C)=p$ , then

$\mathbb P(C\cup D)=(1-p)+(1-p)-(1-p)^2=1-p^2$

4 0

4 years ago

Circuference and area of a circle PLEASE HELP

GalinKa [24]

Answer:

Area=12.56

Circumference= 12.56

Step-by-step explanation:

Area formula is $\pi r^{2}$