**Answer**

**A = 30.25pi. PLS GIVE BRAINLIEST**

**Step-by-step explanation:**

so if circumference is 11, and formula for circumference is 2pi*r, we can work backwards to find the radius.

Radius: 11pi/2 = 5.5pi = 5.5 is radius

Area = pi * r^2

so Area = pi*5.5^2

so A = 30.25pi **left in terms of pi**

**Answer:**

1500

**Step-by-step explanation:**

The area of the regtangular floor is 360m². The floor is going to be retired with tiles having area of 240cm² . We need to find the number of times . Therefore ,

And , the number of tiles required will be ,

**<u>Hence </u>****<u>the</u>****<u> </u>****<u>required</u>****<u> answer</u>****<u> is</u>****<u> </u>****<u>1</u>****<u>5</u>****<u>0</u>****<u>0</u>****<u> </u>****<u>.</u>**

**Answer:**

**Step-by-step explanation:**

The formula is

which models the exponential function

where a is the initial amount of whatever it is you have (in our case it's bacteria), b is the growth rate (ours is 4 which means that every day the number from the day before increases by a factor of 4), and x is the number of days. We plug into the formula the values we have, starting with x = 1:

Always raise what's inside the parenthesis first, then multiply in the 45. 4 to the first is 4, and 4 multiplied by 45 is 180. After the first day, there are 180 bacteria present in the culture.

Next, x = 2:

which simplifies to

y = 45(16) so

y = 720.

Next, x = 3:

which simplifies to

y = 45(64) so

y = 2880

**Answer:**

**Step-by-step explanation:**