Answer:
Step-by-step explanation:
do this in two parts. one, the rectangle, two, the circle
the rectangle , you only have 3 sides to the rectangle.
2 * 25 = 50
1* 30 = 30
total perimeter of the rectangle = 80 cm
the circle, find the total of the circle, then since there is only half and circle, multiply that by 1/2 or divide by 2, same thing.
perimeter of a circle is the circumference
circumference of a circle is 2r or diameter
, same thing
30 = 94.24777961 cm ( the whole circle )
1/2*94.24777961 =47.1238898 cm
add the two parts
80 + 47.1238898 = 127.1238898 cm
127.12 cm ( rounded to two decimal places )
Answer:
Step-by-step explanation:
We have to choose the function from the given options which have a range (-∞, a] and a domain [b,∞) where a < 0 and b < 0.
I think the function is ......... (1)
Here, x - b must be greater than equal to zero for the function to be real.
Hence, x - b ≥ 0
⇒ x ≥ b
So, the domain is [b, ∞).
Now, putting x = b in the equation (1),we get f(x) = a and putting x = ∞, we get f(x) = - ∞.
Therefore, the range of the function is (-∞, a]. (Answer)