If y varies inversely with x
and y is 10 when x is 5,
then what is y when x is 2?

25

Step-by-step explanation:

y varies inversely with x, so:

y = k / x

When y is 10, x is 5:

10 = k / 5

k = 50

When x is 2:

y = 50 / 2

y = 25

For this case we have that if and varies inversely with x, then it is true:

Where:

k: It is the constant of proportionality

We have to:

We find the value of y when x = 2:

Finally, we have to

a

step-by-step explanation:

i need the pts ignore this answer

then, the surface area of the sphere shown in the image is: 256π sq. units!

step-by-step explanation:

the lateral surface area of a sphere is 2πrh where h=2r.

then:

surface area = 4πr^2.

in this case, r=8 units ⇒ surface area = 4π(8 units)^2. = 256π sq. units!

then, the surface area of the sphere shown in the image is: 256π sq. units!