Question

Please assist me with this tsunami speed​

Answer 1

Answer:

  $\text{c.} \quad d=\dfrac{s^2}{9.61}$

Step-by-step explanation:

In any "solve for" scenario, you identify what operations are performed on the variable of interest, then undo them in reverse order.

Here, the square root of d is multiplied by a constant. To undo these operations, we first divide by the constant. That gives ...

  $\dfrac{s}{3.1}=\sqrt{d}$

Then, we square both sides of the equation to undo the square root:

  $\left(\dfrac{s}{3.1}\right)^2=d\\\\d=\dfrac{s^2}{9.61}$

This matches choice C.

Answer 2

Answer:

c. $\displaystyle d = \frac{s^2}{9,61}$

Step-by-step explanation:

$\displaystyle \frac{s}{3,1} = \frac{3,1\sqrt{d}}{3,1} → [\frac{s}{3,1}]^2 = \sqrt{d}^2 → \frac{s^2}{9,61} = d$

I am joyous to assist you anytime.