The interval notation is
Explanation:
The inequality is
Let us complete the square, we get,
Simplifying, we have,
Adding both sides of the equation by 11, we get,
Since, we know that for , if n is even then
Thus, writing the above expression in this form, we get,
Also, if then and
Then ,we have,
and
Solving the inequalities, we get,
and
Merging the intervals, we have,
Hence, writing the solution in interval notation, we have,
Therefore, the answer is
Answer:
Height= 18cm
Step-by-step explanation:
Curved surface area = 2πrh
108π = 2 * π * 3 * h
108π = 6πh
h= 108π ÷ 6π
h= 18cm
Answer:
1, 2, 4, 5, 10, 20
Step-by-step explanation:
Factors of 20 will be numbers that multiply evenly into another whole number to get to 20.
Answer:
1083 seats
Step-by-step explanation:
i just answered that.
arithmetic sequence
a1 = 10
an = an-1 + 1 = a1 + (n-1)×1 = 10 + (n-1) = 9 + n
a38 = 9 + 38 = 47 seats
the sum of such an arithmetic sequence
n×(a1 + an)/2
in our case
38×(10 + 47)/2 = 19×57 = 1083 seats