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<em>Correction to your question text: diameter, not radius.</em>
The area of a circle is given by:

The radius is half of the diameter.

Substitute and solve.

We can assume that the shape is a rectangular prism by the given dimensions
Volume of a rectangular prism
Volume = Area of Base × Height of prism
= Length × Width × Height of prism
Substitute!
168 = L × 7 × 3
168 = L × 21
Divide 21 on either sides to isolate L

=

21 and 21 cancels out
8 = L
L = 8 yd
Answer:
using your brain you have to find it on your own
Answer:
The equation representing the relationships between the cost of laptop and Cole's payment is
.
Step-by-step explanation:
Given:
Cost of laptop = 335
Down payments = $50
Number of equal payments = 
We need to write the equation form the relationships between the cost of laptop and cole's payment.
Solution:
Now we can say that;
Cost of laptop is equal to sum of Down payments and Number of equal payments.
framing in equation form we get;

Hence The equation representing the relationships between the cost of laptop and Cole's payment is
.
Answer:
d. 9x + 63 and 63 square feet
Step-by-step explanation:
Given
Original


Extended



Required
Determine an expression and the value of the extended area
First, we calculate the area of the original desk


From the given parameters, we have:
--- area of the new surface
Open bracket

The area of the new surface is the summation of the area of the original desk and the area of the extended portion (E)
So:

Make E the subject



Hence, the area of the extended portion is 63