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3 years ago

I don't understand this geometry

Mathematics

1 answer:

Dmitry [639]3 years ago

3 0

They are complementary because if you were to put them on top of one another they'd line up. (same degree measurement)

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70 POINTS PLEASE HELP! A dump truck pours sand into a container in the shape of a rectangular prism with a square base of length

galina1969 [7]

Answer:

Step-by-step explanation:

The volume of a rectangular prism is:

$V=\ell wh$

Since the prism has a square base, each side length being 2, this means that both the length and width of our prism is 2. Therefore:

$V=(2)(2)h=4h$

So, we can write:

$V=4h$

The height h increases at a rate of about 8 inches or 8/12 = 2/3 feet per minute.

So, after t minutes, the height will be 2/3(t) feet. Thus, we can substitute:

$\displaystyle V=4\Big(\frac{2}{3}\Big)t=\frac{8}{3}t$

We want to find after how long it will be until the volume is 64 cubic feet. So, V = 64:

$\displaystyle 64 = \frac{8}{3} t$

Solve for t:

$\displaystyle t=\frac{3}{8}(64)=3(8)=24\text{ minutes}$

The correct answer is A.

3 0

3 years ago

Read 2 more answers

The mean age of 5 people in a room is 40 years. A person enters the room. The mean age is now 36. What is the age of the person

Igoryamba

Answer:

$\boxed{\sf \ \ \ age = 16 \ \ \ }$

Step-by-step explanation:

Hello,

as the mean age of 5 people is 40

it means that the sum of the 5 ages is 40*5=200

now a person enters the room, let's note x his age

the new mean is

$\dfrac{200+x}{6}=36$

$200+x=6*36=216\\ x = 216-200=16\\$

So the age of the new person is 16

hope this helps

6 0

3 years ago

Their sum is -8 and their product is -209

lilavasa [31]

Your answer is -206 just subtract

4 0

3 years ago

Read 2 more answers

Graph the linear equation

Salsk061 [2.6K]

Https://us-static.z-dn.net/files/d4c/b1c4613c4e210c04f4bcda5810cab46d.png

4 0

4 years ago

Read 2 more answers

1.N% of 40 is 10. Solve for N. Just put the number.

Serhud [2]

Step-by-step explanation:

N% of 40=10

N/100×40=10

N=10×100/40=25

60%of homework=45min

1%of homework=45/60=3/4min

100%of homework =3/4 ×100=75 min

7 0

3 years ago