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3 years ago

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A model rocket is 3 inches long. The real rocket is 120 feet long.

1 answer:

Nana76 [90]3 years ago

5 0

The units are the complete story on this question. All of the choices are over 1 so the units make the answer over one. It takes more feet than it does inches to make the scale. The correct units are 120 feet / 3 inches. That makes A and B both incorrect.

You can't get 360 by any method but multiplication. The units for multiplication would be ft*in. So D is wrong. That only leaves you with C which is the answer.

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If n(A u B)=23, n(A n B)=9,and n(B)=12. find n(A)

Digiron [165]

Answer:

$\boxed{n(A) = 20}$

Step-by-step explanation:

We know

$n(B)= 12$

From $n(A \cap B)=9$ and $n(A \cup B)=23$ , we conclude $n(A \cup B)=23 = n(A \cap B) + n(A- B) + n(B- A)$

Once $n(B)= 12$ , then $n(B- A) = 12-9 = \boxed{3}$

Taking

$23 = n(A \cap B) + n(A- B) + n(B- A) = 9+ n(A- B) +3 = \boxed{12+ n(A- B) }$

Therefore,

$n(A- B) =11 \implies n(A) - 9 = 11 \implies \boxed{n(A) = 20}$

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4 years ago

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Marrrta [24]

Answer:

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Angelina_Jolie [31]

Keywords

complementary angles, right angle

we know that

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Substitute and solve for Angle TSU

$Angle\ TSU=90\°-25\°=65\°$

therefore

the answer is the option

$65\°$

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