**Answer:**

1. subtraction 2. division 3. division 4. multiplication

**Step-by-step explanation:**

Using **proportions**, it is found that there is a **0.54 = 54% probability** that a randomly selected household owns a cat.

<h3>What is a proportion?</h3>

A proportion is a **fraction **of total amount.

In this problem, the proportions associated with **owning a cat** are given by:

- 70% of 60%(also have a dog).

- 30% of 40%(do not have a dog).

Hence:

p = 0.7(0.6) + 0.3(0.4) = 0.42 + 0.12 = 0.54.

**0.54 = 54% probability** that a randomly selected household owns a cat.

More can be learned about **proportions **at brainly.com/question/24372153

**Answer:**

51.33 cm

**Step-by-step explanation:**

154cm / π = 51.33 cm

**Answer:**

(25x * 4y * 2z) + (15x * 2y^3)

10xy(20z + 3y^2)

(if you want working, just comment [too much effort lol])

The midpoint formula is x1+x2 over 2 and y1+y2 over 2. When you use it to find the midpoint of (0,-8) and (-4,10), you get (-2,1).

Slope formula is y2-y1 over x2-x1, which will give you -6.