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3 years ago

12

A cross section of a rectangular pyramid is made perpendicular to the base and through the vertex as shown. What is the area of

the cross section?

1 answer:

Dima020 [189]3 years ago

5 0

Answer:

20 cm²

Step-by-step explanation:

1/2 ( 5 x 8 ) = 1/2 ( 40 ) = 20

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-Chetan K

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Lucy has two star systems left to visit on her voyage, but her ship is running low on fuel. The first system, KA-77, is 12001200

-Dominant- [34]

Answer:

1348 light years.

Step-by-step explanation:

Please find the attachment.

Let x represent the distance between KA-7 and KA-11.

We have been given that the first system, KA-7, is 1200 light years away while the second system, KA-11, is 1700 light years away. Lucy sees an angle of 52 degrees between KA-7 and KA-11.

We can see from our attachment that Lucy, KA-7 and KA-11 forms a triangle and we will use law of cosines to solve for x.

$(AB)^2=(AC)^2+(BC)^2-2(AC)(BC)*cos (C)$

Upon substituting our given values in above formula we will get,

$x^2=1200^2+1700^2-2*1200*1700*cos (52^o)$

$x^2=1440000+2890000-4080000*0.615661475$

$x^2=4330000-2511898.81933008$

$x^2=1818101.18066992$

Let us take square root of both sides of our equation.

$x=\sqrt{1818101.18066992}$

$x=1348.3698234\approx 1348$

Therefore, KA-7 and KA-11 are approximately 1348 light years apart.

6 0

3 years ago

SUPER EASY WILL GIVE BRAINLEIST IF DONE BEFORE 10 P.M. PLS HURRY. IF U HAVE TIME PLS HELP ME ON OTHER QUESTIONS THANK YOU

Nookie1986 [14]

Answer:

180 inches

Step-by-step explanation:

5x3=15

The flag is 15 feet.

To convert feet to inches, multiply by 12.

15x12=180.

So the flag is 180 inches.

6 0

4 years ago

What is the value of k?<br> k=

NARA [144]

Anything else to go with that?

7 0

3 years ago

Convert the angle theta equals 260 degrees to radians

Sphinxa [80]

Answer:

13π/9 radians

Step-by-step explanation:

260° = 260⁽²⁰π/180 = 13π/9 radians

8 0

3 years ago

If sin Θ = 2 over 3 and tan Θ < 0, what is the value of cos Θ?

guapka [62]

If sin Θ is positive and tan Θ is negative, then the angle should be in the second quadrant using the rule of thumb. In this case, cos Θ is expected to be negative. Using the calculator, the answer is -0.7454. This is equivalent to option D. <span>negative square root of 5 over 3</span>

6 0

3 years ago

Read 2 more answers