Answer:
The area of the riders field of view is 987.5 square yards.
Step-by-step explanation:
The human has a 180° arc view. If the rider can see only 25 yards, the area of the riders field of view is a semi-circle (180° arc) of 25 yards of radius.
The semi-circle of 25 yards of radius has an area of:

The area of the riders field of view is 987.5 square yards.
Answer:
Marna needs to answer correctly 17 times.
Step-by-step explanation:
-5 * 17 = -85, anything lower won't work.
Answer:

Step-by-step explanation:
We can use the exponential growth formula:
y = a(1+r)ˣ
where
y = amount after x time
a = initial amount
r = growth rate as a decimal fraction
x = number of years
Data:
a = 170 000
r = 0.04
Calculations:

The figure below also shows that the population will grow to about 272 000 in 12 yr.