Provide an appropriate response.The area of a circle depends on the length of its radius.(a)Write a function a(r) for the area of a circle.(b)How many square units of sod are needed to cover a circular grass area of radius x?(c)If the radius of the circular grass area is increased by 2 feet, how much more sod is needed?(d)How much more sod is needed per foot increase?(e)If the radius of a circular grass area is increased by h, how much more sod is needed?(f)How much more sod is needed per unit increase?
What will be an ideal response?
| (a) | a(r) = ?r2 |
| (b) | ?x2 square feet |
| (c) | 4?x + 4? square feet |
| (d) | 2?x + ? square feet |
| (e) | 2?xh + ?h2 square units |
| (f) | ?x + ? square units |
Mathematics
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Solve the problem.Your cable bill increased last year. For the first 5 months your bill was $25.89 each month. For the remaining 7 months it was $27.89 each month. Find the average amount of your cable bill for the year.
A. $32.47 B. $324.68 C. $27.06 D. $26.89
Mathematics
Let R, F, L, B, T, U mean rotate 90° clockwise the right, front, left, back, top, and under faces, respectively. Name the move that will return the cube to standard position after making the move BU.
What will be an ideal response?
Mathematics
Solve the problem.Find the average rate of change of f(x) = sec x from 0 to 
.
A. 
B. 
C. 
D. 
Mathematics
Factor by grouping.20y2 - 27y + 9
A. (20y - 3)(y - 3) B. (20y + 3)(y + 3) C. (4y + 3)(5y + 3) D. (4y - 3)(5y - 3)
Mathematics