1.
Find a number that when squared equals 484.
A.
22 or -22
B.
22 only
C.
None of these is correct
D.
-22 only
Hint
2.
Solve the equation
x
2
= 0.81.
A.
x
= 0.9 or
x
= -0.9
B.
none of these is correct
C.
x
= -0.9 only
D.
x
= 0.9 only
Hint
3.
Use an exponent to write 177,147 as a power of 3.
A.
3
17
B.
3
11
C.
3
19
D.
3
9
Hint
4.
Which number is not equal to the other three?
A.
B.
C.
2
-2
D.
Hint
5.
Use the following table to find the population of bacteria in hour
n
.
A.
180,000
n
B.
30,000 × 6
6
C.
30,000
6
n
D.
6 × 30,000
n
Hint
6.
Which equation represents exponential decay?
A.
y
=
· 63
x
B.
y
= 63 × 4
x
C.
y
= 63 × 4.4
x
D.
y
= 63 × 0.4
x
Hint