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Mekhanik [1.2K]
3 years ago
7

Helppppppp with this question quick

Mathematics
1 answer:
Reptile [31]3 years ago
6 0

Answer:

c

Step-by-step explanation:

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Round 0.578 to the nearest tenth
Deffense [45]

0.578 rounded to the nearest tenth would be 0.6, since the 7 in the hundredths spot is higher than 5.

5 0
3 years ago
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17. Which of the following is the correct formula for finding power in a DC circuit? A. P = I2R B. P = VR C. P = IR D. P = V2I
netineya [11]

Answer:

Choice A. P = I² · R where

  • P is the power in the DC circuit,
  • I is the current through the circuit, and
  • R is the total resistance of the circuit.

Step-by-step explanation:

Electrical power is the rate at which the electrical force does work. So what is electrical work? That's the work W that the electrical force do when it moves charges Q across a potential difference V:

W = V\cdot Q.

The power is the rate at which the electrical force do the work:

\displaystyle P = \frac{W}{t} = V \cdot \frac{Q}{t}.

On the other hand, current I is the charge through a cross-section of the circuit in unit time. By the definition of current:

\displaystyle\frac{Q}{t} = I.

\displaystyle P =V \cdot \frac{Q}{t} = V\cdot I.

Consider Ohm's Law:

V = I \cdot R.

Therefore

\displaystyle P = V\cdot I = (I \cdot R) \cdot I = I^{2}\cdot R.

6 0
4 years ago
Read 2 more answers
Diego’s dog weighs more than 10 kilograms and less than 15 kilograms. Select the set of inequalities that must be true if w is t
hichkok12 [17]

Answer:

Step-by-step explanation:

Correct

w > 10

w > 10

Incorrect

w < 10

w < 10

Incorrect

w > 11

w > 11

Incorrect

w < 11

w < 11

Correct

w < 15

w < 15Correct

w > 10

w > 10

Incorrect

w < 10

w < 10

Incorrect

w > 11

w > 11

Incorrect

w < 11

w < 11

Correct

w < 15

w < 15Correct

w > 10

w > 10

Incorrect

w < 10

w < 10

Incorrect

w > 11

w > 11

Incorrect

w < 11

w < 11

Correct

w < 15

w < 15Correct

w > 10

w > 10

Incorrect

w < 10

w < 10

Incorrect

w > 11

w > 11

Incorrect

w < 11

w < 11

Correct

w < 15

w < 15Correct

w > 10

w > 10

Incorrect

w < 10

w < 10

Incorrect

w > 11

w > 11

Incorrect

w < 11

w < 11

Correct

w < 15

w < 15Correct

w > 10

w > 10

Incorrect

w < 10

w < 10

Incorrect

w > 11

w > 11

7 0
3 years ago
The volume of a rectangular pyramid is 900 cubic centimeters.It has a length of 10 centimeters and a width of 9 centimeters. Wha
MariettaO [177]
The height of a rectangular pyramid is 30 cm.

volume of rectangular pyramid = (length x width x height) / 3

Given: 
Volume = 900 cm³
Length = 10 cm
Width = 9 cm
Height = ?

V = lwh/3
900 cm³ = (10cm * 9cm * h)/3
900 cm³ * 3 = (90cm² * h)/3 * 3
2700 cm³ = 90cm² * h
2700 cm³/90cm² = 90cm² * h/90 cm²
30 cm = h

to check:
900 cm³ = (10 cm * 9 cm * 30 cm)/3
900 cm³ = 2700 cm³/3
900 cm³ = 900 cm³
3 0
3 years ago
My math teacher just gave me a super hard question WILL GIVE CROWN!!!!
saveliy_v [14]
This one is super difficult, I see your struggle but the answer is A.
6 0
2 years ago
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