Answer:
Altitude of cylinder = 10 cm
Step-by-step explanation:
Given:
lateral surface area of cylinder = 90 cm²
Circumference of base = 9 cm
Find:
Altitude of cylinder
Computation:
Circumference of base = Circumference of cylinder
So,
2πr = 9
lateral surface area of cylinder = 2πrh
2πrh = 90
We know that; 2πr = 9
9(h) = 90
h = 90 / 9
Answer
x.x.x.x.x = 5x
Domain: x ≥ 7
Range (7,9)
x=12 or x= -12 (answer A)
|x| – 5 = 7
|x| = 12
-7
