**Step-by-step explanation:**

If x is the volume of pure water:

Initial + added = final

0.95 (840) + 0 (x) = 0.70 (840 + x)

798 = 588 + 0.70 x

x = 300

840 + x = 1140

You need to add 300 mL of pure water to obtain 1140 mL of the desired 70% solution.

<u>**Given**</u>:

Given that the radius of the sphere is 9 cm

We need to determine the volume of the sphere.

<u>**Volume of the sphere:**</u>

Let us determine the volume of the sphere.

The volume of the sphere can be determined using the formula,

where r is the radius of the sphere.

Substituting r = 9 in the above formula, we get;

Thus, the** volume of the sphere is 972π cm³**

**Hence, Option B is the correct answer.**

**Answer:**

There are infinite ordered pairs are on the line because it has infinite solutions.

**Step-by-step explanation:**

5x - 2y = 6

-5x -5x

-2y = -5x + 6

-2y/2 = -5x/-2 + 6/-2

y = 5/2x - 3

5x - 2(5/2x - 3) = 6

5x - 5x + 6 = 6

6 = 6

infinte solutions

**Answer:**

**Answer:**

**Step-by-step explanation:**

**Step-by-step explanation:**

**Answer:**

0.019

**Step-by-step explanation:**

Just move the decimal places 3 times from the end to get your answer