Answer:
Step-by-step explanation:
radius of a coin is 12 mm
Diameter of the coin is twice the radius = 2 x 12mm = 24mm
The circumference of the coin= 2πr = 2 x3.14 x 12 = 75.36m
Area of coin = πr²= 3.14 x 12 x12 = 452.16mm²
what is the area of the coin
Answer:
10
Step-by-step explanation:
2(x+9)+142=180 corresponding angles are equal and angles on a straight line=180
2(x+9)=180-142
x+9=38/2
x=19-9
x=10
Answer:
3750
Step-by-step explanation:
Total Cost in a day is

. Profit function is

. And the revenue function is

. In a day, bookstore must sell at least 15 books, because of 6n-90=0, in order to make profit.
You should times each side by 3/2, so your answer is C.