Y = -2x^2 + 50x + 300
-2x^2 + 50x + 300 ≥ 300
-2x^2 + 50x ≥ 0
-2x^2 ≥ -50x
x^2 ≤ 25x
x ≤ 25
Therefore, required domain is 0 ≤ x ≤ 25
Answer:
1000
Step-by-step explanation:
area of rectangle = width x length
Given:
- width of floor = 40 m
- length of floor = 50 m
⇒ area of floor = 40 x 50 = 2000 m²
Given:
- width of tile = 1 m
- length of tile = 2 m
⇒ area of tile = 1 x 2 = 2 m²
Number of tiles needed = area of floor ÷ area of one tile
= 2000 ÷ 2
= 1000
2400/6000 multiplied by 100 = 40%
22.9 is the closest but not exact. It was probably rounded off.
I used the formula: leg^2+leg^2=hypotenuse^2
(You can use that formula for any right triangle.)
