**Answer:**

I would say the answer is 13.5

**Step-by-step explanation:**

Times 7.5 (hours) and $1.80 (dollars).

The reason why this works:

It is $1.80 per hour so if you multiply it by 7.5 the amount of hours that would make it so you'd get the answer $13.5

**Answer:**

answer is option A: 13m+8

To tessellate a surface using a regular polygon, the interior angle must be a sub-multiple (i.e. factor) of 360 degrees to cover completely the surface.

For a regular three-sided polygon, the interior angle is (180-360/3)=60 °

Since 6*60=360, so a regular three-sided polygon (equilateral triangle) tessellates.

For a regular four-sided polygon, the interior angle is (180-360/4)=90 °

Since 4*90=360, so a regular four-sided polygon (square) tessellates.

For a regular five-sided polygon, the interior angle is (180-360/5)=108 °

Since 360/108=3.33... (not an integer), so a regular five-sided polygon (pentagon) does NOT tessellate.

For a regular six-sided polygon, the interior angle is (180-360/6)=120 °

Since 3*120=360, so a regular six-sided polygon (hexagon) tessellates.

**Answer:**

C

**Explanation:**

B=Base Area

In a cylinder, the base area is a circle.

Area Circle=pi r^2

Replace base area with area of circle:

V=pi r^2 H