All categories

2 years ago

I really need help on this help me please

Mathematics

2 answers:

Eduardwww [97]2 years ago

8 0

Answer:

by migration

Step-by-step explanation:

people believed in things then moved and showed others

IrinaK [193]2 years ago

6 0

Answer:

Step-by-step explanation: different cultures pick up another cultures way of living and soon it becomes there way of life as well, 6th grade social studies I feel you.

You might be interested in

I need help with this.

Sveta_85 [38]

Answer:

check online for more information

6 0

2 years ago

A 2000 gallon fish aquarium can be filled by water flowing at a constant rate in 10 hours. When a decorativve rock is placed in

Elza [17]

Answer:

The volume of the rock is 13.368 cubic feet.

Step-by-step explanation:

The volume of the rock ( $V_{r}$ ), measured in gallons, is equal to the volume of the fish aquarium without the decorative rock ( $V'$ ) minus the volume of the fish aquarium with the decorative rock ( $V''$ ), both measured in gallons.

Since the water flow is at constant rate, the volume of the rock is expressed by the following equation:

$V_{r} = V' - V''$

$V_{r} = \dot V \cdot (\Delta t_{1}-\Delta t_{2})$ (1)

Where:

$\dot V$ - Flow rate, measured in gallons per hour.

$\Delta t_{1}$ - Filling time of the fish aquarium without the decorative rock, measured in hours.

$\Delta t_{2}$ - Filling time of the fish aquarium with the decorative rock, measured in hours.

And the flow rate is:

$\dot V = \frac{2000\,gal}{10\,h}$

$\dot V = 200\,\frac{gal}{h}$

The flow rate is 200 gallons per hour.

If we know that $\dot V = 200\,\frac{gal}{h}$ , $\Delta t_{1} = 10\,h$ and $\Delta t_{2} = 9.5\,h$ , then the volume of the rock is:

$V_{r} = \left(200\,\frac{gal}{h}\right)\cdot (10\,h-9.5\,h)$

$V_{r} = 100\,gal$

$V_{r} = 13.368\,ft^{3}$

The volume of the rock is 13.368 cubic feet.

8 0

2 years ago

8x-6y=-20 -16x+7y=30

o-na [289]

Simplifying 8x + -6y = -20

Solving 8x + -6y = -20

Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right

Add '6y' to each side of the equation. 8x + -6y + 6y = -20 + 6y

Combine like terms: -6y + 6y = 0 8x + 0 = -20 + 6y 8x = -20 + 6y

Divide each side by '8'. x = -2.5 + 0.75y

Simplifying x = -2.5 + 0.75y

8 0

3 years ago

Find the area of the larger sector. Round to the nearest tenth.

vampirchik [111]

Answer:

399.6 square miles

Step-by-step explanation:

The Area of a sector =

x/360° × πr²

r = 13.4 miles

x = 255°

Hence,

255°/360° × π × 13.4²

= 399.5739336 square miles

Approximately = 399.6 square miles

6 0

3 years ago

Read 2 more answers

PLEASE HELP AS SOON AS POSSIBLE!

ad-work [718]

Step-by-step explanation:

(i) 240 ÷ 4000 = 0.06

(ii) 760 ÷ 4000 = 0.19

(iii) (20 + 10) ÷ 4000 = 0.0075

I guess this is the answer

i am not sure!!!!

3 0

2 years ago