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3 years ago

12

during a nature walk jill identified 20 species of animals n plants jill said that 1/3 rd of the specie s she identified where a

nimals can this be correct explain

1 answer:

ololo11 [35]3 years ago

4 0

No because 20 divided by 1/3 is 6.6666666.7

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A 12 ounce bottle of cleaner cost $3.74 a 16 ounce bottle of cleaner cost $5.34 which bottle would be the best spot which cost l

Valentin [98]

Answer:

12 ounce bottle

Step-by-step explanation:

12 x 3 = 36

16 x 5 = 80

So, that means the 12 ounce bottle is cheaper. :)

5 0

4 years ago

Determine the length and conductivity of a wire with diameter 4.2 mm constructed from an alloy of resistivity 3.2 x 10^-8 ohms-m

xz_007 [3.2K]

Answer:

1) L = 3.465 × 10^2; 31250000 S/m

2) terminal pd = 11V

3) ₦2

Step-by-step explanation:

1)

diameter of wire (d) = 4.2mm = 4.2 × 10^-3m

resistivity 3.2 x 10^-8 ohms-meter

Resistance(R) = 0.8 ohms

Area of wire (A)= πd^2 / 4

A =[ ( 22/7) * (4.2×10^-3)^2] / 4

A = [22/7 * 17.64×10^-6] / 4

A = 13.86×10^-6m^2

Recall:

Resistivity = (R ×A) / Length

Length = (R × A) / resistivity

Length(L) = [(0.8)(13.86×10^-6)] / 3.2 x 10^-8

L = (11.088 × 10^-6) / 3.2 x 10^-8

L = 3.465 × 10^2

Conductivity = 1/resistivity

Conductivity = 1/3.2 x 10^-8

Conductivity = 31250000 S/m

2)

Series resistor = 1.5 and 4.0 ohms

e.m.f (E) = 12V, internal resistance 'r' = 0.5

Recall :

I = E / (R + r)

Where I = current

R = circuit resistance

R = Rs = 1.5 + 4.0 (series connection) = 5.5

Recall : I = V/R

Where V = voltage ( terminal pd)

Therefore,

V/R = E/(R+r)

V/5.5 = 12/(5.5 + 0.5)

V/5.5 = 12/6

V/5.5 = 2

V = 5.5 × 2

V = 11V

3) power = 100W, t =10 hours

Energy consumed = power × time

Energy consumed = 100W × 10 hrs = 1000Whr

Recall: 1 KW = 1000 W

Therefore, energy consumed = 1KW

Cost of energy per KW = ₦2

Therefore, cost of lightning the lamp = ₦2 × 1KW = $2

4 0

4 years ago

What’s the midpoint of (10, -3) and (-2, -1)

Bogdan [553]

X point:

10+-2/2=

8/2=

4

Y point:

-3+-1/2=

-4/-2=

2

Your answer: (4,2)

5 0

4 years ago

Read 2 more answers

Given the domain {-4, 0, 5}, what is the range for the relation 12x, + 6y = 24?

Alinara [238K]

↣ Substitute all domains in the equation for the ranges.

$12x+6y=24$

$2x+y=4$ ↣ Divide the whole equation by 6.

↣ Substitute x = -4 in the equation.

$2(-4)+y=4\\-8+y=4\\y=4+8\\y=12$

Our range is 12 when x = -4. In the choice there is only one choice that has range value as 12. Therefore, the answer is B.

↣ <em>If you want me to solve for all ranges then you can reply under this. Since there is only one choice that has 12 as range value, I decide not to continue. So If you want me to solve for all ranges then feel free to reply under this. ↣</em>

7 0

3 years ago

The figure below is made of unit cubes

charle [14.2K]

Answer:

Ok cool can i see the figure?

7 0

3 years ago