If Xx8=y is the rule,and the value of x is 4, what is the value of y

Answers

Answer 1

Answer: $x* 8 = y\n 4* 8 = y\n \boxed{y = 32}$

Answer 2

Answer: $8x=y, x = 4, 8*4 = y, y =32$

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Describe two ways 5000 and 500 are related

Answers

Answer:

they both can be multiplied by 10 and both have more than one 0

Step-by-step explanation:

50*10=500

500*10=5000

sorry this is my first time answering a question so idk fully if its right -_-

If y(x)=1/3cos^34x,then dy/dx is

Answers

Answer:

$(dy)/(dx)=-4\cos^(2) 4x \sin4x$

Step-by-step explanation:

We have $y=f(x)=(1)/(3) \cos^(3) 4x$ and we have to find $(dy)/(dx)$

Now, $y=f(x)=(1)/(3) \cos^(3) 4x$

Differentiating both sides of the equation with respect to x we get,

$(dy)/(dx) = (1)/(3) * 3 * \cos^(2) 4x * (-\sin4x) * 4$ {Since we know the formula $(dx^(n) )/(dx) =nx^(n-1)$ and another formula $(d(\cos x))/(dx) = -\sin x$ }

⇒ $(dy)/(dx)=-4\cos^(2) 4x \sin4x$ ( Answer )

What is a rational number between 1/8 and 1/4?

Answers

$\frac18<x<\frac14\n\frac18<x<\frac28\n\frac2{16}<x<\frac4{16}\n<span>x=\frac3{16}$

The rationalnumber between 1/8 and 1/4 is 3/16.

We have,

To find a rationalnumber between two given fractions, we can take their average.

In this case, the given fractions are 1/8 and 1/4.

The average of two fractions is found by adding them together and dividing by 2.

So, we have (1/8 + 1/4) / 2.

To add the fractions, we need a common denominator, which in this case is 8.

1/8 + 1/4 = 1/8 + 2/8 = 3/8.

Then, we divide 3/8 by 2 to find the average:

(3/8) / 2 = 3/8 * 1/2 = 3/16.

Therefore,

The rationalnumber between 1/8 and 1/4 is 3/16. It lies exactly halfway between the two given fractions on the number line.

Learn more about rationalnumbers here:

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A 120-watt light bulb uses about 0.1 kilowatt of electricity per hour. If electricity costs $0.20 per kilowatt hour, how much does it cost to have the bulb on for an hour?

Answers

There is no such thing as a "kilowatt per hour". If that's actually what the question says, then it's a defective question, and you should put it away before it makes you any more confused. A 120 watt light bulb uses exactly 0.12 kilowatt when it's turned on. In one hour, it uses (0.12 kilowatt) x (1 hour) = 0.12 kilowatt-hour of energy. If energy costs $0.20 per kilowatt-hour, then the cost is (0.12) x (0.20) = 2.4 cents. (0.024 dollar)

What is one third of 518?