U is jointly proportional to V and W . Let k be the constant proportionality. If U = 3 when V = 8 and W = 7, find k

a) 7/64

b) 168
c) 64/7
d) 3/56
e) 24/7
f) None of the above.

http://www.icoachmath.com/Sitemap/JointlyProportional.html

Thank you. Found the answer. Shoulda googled it first. hehe

To find the constant of proportionality, k, in the given equation U = kVW, we can use the given values of U, V, and W.

According to the problem statement, U is jointly proportional to V and W, which means that U is equal to the product of V and W, multiplied by a constant k:

U = kVW

Now, we can substitute the given values of U, V, and W to find k. We have U = 3, V = 8, and W = 7. By substituting these values into the equation, we get:

3 = k * 8 * 7

Simplifying further:

3 = 56k

To isolate k, divide both sides of the equation by 56:

3/56 = k

Therefore, the value of k is 3/56.