Diameter of the semicircle = 10 km.
Explanation: perimeter of semicircle = 1 2
the circumference + diameter Given: perimeter of semicircle = 25.7 k
m
Circumference of circle with radius r
= 2
π
r where 2
r
= diameter ⇒
25.7
=
22
π
r
+
2
r
⇒
25.7
=
π
r
+
2
r
=
r
(
π
+
2
) ⇒
25.7
=
r
(
3.14
+
2
)
=
r
(
5.14
) ⇒
r
=
=5m
⇒d
i
a
m
e
t
e
r
=
2
r
=
10
k
m
T=4(r-1.5)
4(3.59-1.5)=t= 8.36 dolla
Enjoy.
Yes, they are.
Inverse of matrices:
plug matrix into calculator
second matrix
edit
second quit
second matrix
press A
press x^ -1
enter
<h3>Answer:</h3>
Prime
<h3>Solution:</h3>
- Let's factor this expression.
- x^2+16
- The expression is prime.
- Let's see why all the other options are wrong.
- Option A) (x+4)(x+4)
- x*x
- x*4
- 4*x
- 4*4
- This makes x^2+8x+16, not x^2+16.
Hope it helps.
Do comment if you have any query.
Answer:
The answer is 1 over 3.
Step-by-step explanation:
All you had to do was simplify it.