Answer:
Therefore, when s is equal to 30, t is equal to 30 / 5 = <<30/5=6>>6.
Explanation:
Direct variation means that the ratio between two variables is always constant. In this case, the constant ratio between s and t is equal to 20/4 = 5. This means that when t is equal to 4, s is equal to 20 and the ratio between the two is 5. If s is equal to 30, we can find the corresponding value of t by setting up the following equation:
s / t = 5
We can then solve for t by multiplying both sides of the equation by t to get:
s = 5 * t
If we substitute 30 for s, we get:
30 = 5 * t
We can solve for t by dividing both sides of the equation by 5:
t = 30 / 5
Therefore, when s is equal to 30, t is equal to 30 / 5 = <<30/5=6>>6.