Square root of 81 is 9.
Each side is 9 cm.
9 times 4 (4 being the sides of the square) = 36
Perimeter=36
Answer:
Number of Years to Double= 10.62 years
Step-by-step explanation:
<u>First, we need to calculate the real annual interest rate:</u>
Real annual interest rate= {[(i/12)+1]^12} - 1
Real annual interest rate= [{(0.064/12) + 1]^12 - 1}
Real annual interest rate= 0.0659
<u>Now, we need to use the rule of 72. The rule of 72 is a means of estimating the number of years it takes for an investment or your money to double. </u>
<u></u>
Number of Years to Double= 70/Annual Rate of Return
Number of Years to Double= 70/6.59
Number of Years to Double= 10.62 years
Answer:
b
Step-by-step explanation:
The equation:
3
x
2
−
5
x
−
12
=
0
is in the form:
a
x
2
+
b
x
+
c
=
0
with
a
=
3
,
b
=
−
5
,
c
=
−
12
The roots are given by the quadratic formula:
x
=
−
b
±
√
b
2
−
4
a
c
2
a
x
=
5
±
√
(
−
5
)
2
−
4
(
3
)
(
−
12
)
2
(
3
)
x
=
5
±
√
25
+
144
6
x
=
5
±
√
169
6
x
=
5
±
13
6
That is:
x
=
5
+
13
6
=
18
6
=
3
or
x
=
5
−
13
6
=
−
8
6
=
−
4
3
Answer:
>90°
degrees from below 90 degrees