SELECT ALL THAT APPLY Which equations could you use to solve the following problem?

Seventy-eight is 55% of what number?
1. 78 = (0.55)w
2. p = (0.85)78
3. x/78 = 55/100
4. 78/x = 55/100

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

You are standing next to a really big circular lake. you want to measure the diameter of the lake, but you don't want to have to swim across with a measuring tape! you decide to walk around the perimeter of the lake and measure its circumference, and find that it's 400\pi\text{ m}400? m. what is the diameter dd of the lake?

38 points and brainliest plz answer question in word document