The formula for the surface area of a sphere is
If your radius is 2, then filling in that formula looks like this:
or
. If you leave your answer in terms of pi, which is the exact answer, you're done. But if you multiply pi in, your surface area is SA = 50.264 square cm.
Answer:
A box = $11
Step-by-step explanation:
Given
Represent the first order with A and the second with B.
So, we have:
Solving (a): Find B.
To find B, we make use of:
Make B the subject
Substitute values for Total and A
Open bracket
Collect Like Terms
Solving (b): Cost of a box of light bulb
This means that:
Substitute 7x + 13 for Total
Collect Like Terms
Make x the subject
Answer:
59.1 feet
Step-by-step explanation:
The formula for the circumference of a circle in C=2πr. Since the radius of the circle is given, all you have to do is plug it into the equation.
C=2πr
C=2π(9.4)
C=18.8π feet <-- this is the exact answer
<u>C=59.1 feet</u>
Answer:
196 sq cm
Step-by-step explanation:
that's all I can say really
3 -
=
- 7
First, simplify
to
/ Your problem should look like: 3 -
=
- 7
Second, simplify
to
/ Your problem should look like: 3 -
=
- 7
Third, multiply both sides by 9 (the LCD of 9,3). / Your problem should look like: 27 - 2b = 3b - 63
Fourth, add 2b to both sides. / Your problem should look like: 27 = 3b - 63 + 2b
Fifth, simplify 3b - 63 + 2b to 5b - 63. / Your problem should look like: 27 = 5b - 63
Sixth, add 63 to both sides. / Your problem should look like: 27 + 63 = 5b
Seventh, simplify 27 + 63 to 90. / Your problem should look like: 90 = 5b
Eighth, divide both sides by 5. / Your problem should look like:
= b
Ninth, simplify
to 18. / Your problem should look like: 18 = b
Tenth, switch sides. Your problem should look like: b = 18
Answer:
b = 18
