Find a function whose graph is the top half of the circle with radius 6 and center at the origin.

f(x)=?

ANSWER

EXPLANATION

The equation of a circle centered at the origin, with radius r units is given by

The given circle has radius 6 cm.

The equation becomes:

We solve for y to obtain,

The top half of the circle is always positive, hence its equation is:

Or

answer: 180

step-by-step explanation:

12-2=10

20-2=18

10x18=180

answer:   28.56 feet (approx)

step-by-step explanation:

since, triangle abc has measure of angle c equal to 55 degrees, measure of angle abc equal to 90 degrees, and length of bc equal to 20 feet.

we have to find out the measurement of segment ab.

therefore, tan 55° =

but bc = 20 feet.

⇒ tan 55 ° =  

⇒ ab = 20 × tan 55 °

⇒ ab = 20 × 1.42814800674

⇒ ab = 28.5629601348   ≈ 28.56 feet