The answer would be percent decrease because if it started at 50 and turned to 40, it lowered since we know 50 is higher than 42 so it dropped by 8 since 8 divided by 50 0.16 and 0.16 times 100 EQUALS 16%
No, I think it has 2 solutions.
Answer:

So then after 2.2 hours with an average speed of 12.5 mi/hr the hot air ballon will travel 27.5 mi
Step-by-step explanation:
For this problem we know that the distance traveled by an object is given by:
(1)
Where d is the distance r the average speed and t the time.
From the info given we know that
and 
And replacing into formula (1) we got:

So then after 2.2 hours with an average speed of 12.5 mi/hr the hot air ballon will travel 27.5 mi
Answer:
86.28 ft²
Step-by-step explanation:
The figure given consists of a rectangle and a semicircle.
The area of the figure = area of rectangle + area of semicircle
Area of rectangle = 
Where,
l = 10 ft
w = 8 ft

Area of semicircle:
Area of semicircle = ½ of area of a circle = ½(πr²)
Where,
π = 3.14
r = ½ of 8 = 4 ft
Area of semi-circle = ½(3.14*4) = 6.28 ft²
Area of the figure = area of rectangle + area of semi-circle = 80 + 6.28 = 86.28 ft² (nearest hundredth)