2 years ago

What is 1/4 as a percent

Mathematics

1 answer:

antoniya [11.8K]2 years ago

5 0

Answer:

0.4

Step-by-step explanation:

just add a cero mi uyrhv de ryu.

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which has greater cenetic energy a car traveling 30.0 km/hr or one twice as heavy traveling at 15 km/hr?

iVinArrow [24]

Answer:

30 km/h car

Step-by-step explanation:

From analysis the car traveling at 30 km/h has greater kinetic energy

we can deduce it from the expression of kinetic energy which is

$KE=\frac{1}{2} mv^2$

Assuming the mass m= 1 kg

For the 30 km/h

$KE=\frac{1}{2}*1*30^2 \\\\KE=\frac{1}{2}*1*900\\\\\KE=450 J$

For the 15 km/h

$KE=\frac{1}{2}*2*15^2 \\\\ KE=\frac{1}{2}*2*225 \\\\\ KE=\frac{1}{2}*450 J\\\\\ KE=225 J$

Though the kinetic energy is a function of mass and velocity, but from our analysis the faster moving object has more KE

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3 years ago

Solve for x: 3+(-5)x=19

malfutka [58]

3+(-5)x=19
Subtract 3 from both sides of the equation.
-5x= 16
Divide by -5 on both sides
X= -3.2

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3 years ago

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What number should be added to both sides of the equation to complete the square?<br> x2 + 12x = 11

makkiz [27]

given:

x² + 12x = 11

perfect square:

a² + 2ab + b²

a² = x² ⇒ x * x

2ab = 12x ⇒ 2(6)x

b² = 6² ⇒ 36

x² + 12x + 36 = 11 + 36

(x+6)(x+6) = 47

Both sides must be added with 36.

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3 years ago

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In 1850, a person sold a house to a lady for $30. If the lady had put the $30 into a bank account paying 4% interest, how much w

jekas [21]

30$ profit each person of connect

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3 years ago

Determine the kinetic energy of a 1000 kg roller coaster car that is moving with a speed of 20.0 m/s

Vedmedyk [2.9K]

KE = 0.5*m*v2 KE = (0.5) * (1000 kg) * (20 m/s)2

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2 years ago