1.
Estimate the area of the triangular piece of land using Heron's formula.
A.
11 square miles
B.
10 square miles
C.
12 square miles
D.
9 square miles
Hint
2.
Suppose you are in a building and your eyes are 1,000 feet above the ground. The distance you can see to the horizon is
where
h
represents the height your eyes are from the ground in feet and
d
is the distance in miles. About how far can you see to the horizon if you estimate
to the nearest whole number?
A.
about 37 miles
B.
about 38 miles
C.
about 39 miles
D.
about 36 miles
Hint
3.
The formula
gives the minimum speed
s
of a car in miles per hour, where
d
is the distance in feet the car skidded after its brakes were applied and
f
is a drag factor that depends on the road surface. A car left skid marks for 80 feet on a dry, concrete road surface with a drag factor of 0.82. Find the minimum speed to the nearest mile per hour.
A.
42 miles per hour
B.
48 miles per hour
C.
46 miles per hour
D.
44 miles per hour
Hint
4.
Estimate the length of a side of a square whose area is 262 in
2
.
A.
16 in.
B.
17 in.
C.
15 in.
D.
18 in.
Hint
5.
On a clear day, the distance in miles that you can see to the horizon is about 1.23 ×
, where
h
represents the height of your eyes above the ground in feet. Estimate the distance you can see if your eyes are 98 feet above ground.
A.
11 miles
B.
13 miles
C.
12 miles
D.
10 miles
Hint