What is the area of a semi circle that has a diameter of 1 1/2?

Step-by-step explanation:

Area of circle:

By using the area of a circle, we can get the area of a semicircle:

Let's convert the mixed fraction to an improper fraction and then a decimal:

= =

Now, we solved for the diameter, to get the radius, we need to divide the diameter by 2:

Now we have the radius, so we can plug in our values and find the area:

Step-by-step explanation:

d = 1 =

r =

 =

 =

Now, area of circle = πr² = π² = π

                                         = 1.767 cm²

Area of the semicircle = =

                                     = 0.88 cm²

i assume that by 5 you mean 5 gallons.

(20)(0.25) = 15

removing 15 gallons reduces the tank from 20 to 5.

on friday there were 15 birds