Answer:
rectangular prism
Step-by-step explanation:
A rectangular prism has 6 sides that are rectangles.
Let pen's cost be x and pencil's cost be y.
6x + 5y = 2.50
3x + 2y = 1.15
Thus, 3x = 1.15 - 2y
Therefore, 6x = 2.30 - 4y
Substituting the value of 6x ;
(2.30 - 4y) + 5y = 2.50
or, 2.30 + y = 2.50
=> y = 0.20.
Substituting the value of y ;
6x = 2.30 - 4(0.20)
6x = 2.30 - 0.80 = 1.5
6x = 1.5
=> x = 0.25
Thus, 1 pen costs 0.25 $ and 1 pencil costs 0.20$.
Thus, cost of one pen is 0.25$.
Cost of 4 pencils is 0.80 $
0.25$ + 0.80$ = 1.05$
Answer:0.9c
Step-by-step explanation:
Subtract 0.1c from c
now, b is -3, and a is 3
or in rectangular if you wish, y = -3 and x = 3.... on what quadrant is "y" negative and "x" positive? well, the 4th quadrant
so, using our reference angle, that'd be
so, let's use the first one
![\bf (3,3i)\implies \begin{array}{llll} r[cos(\theta)+i\ sin(\theta)]\\\\ 3\sqrt{2}\left[ cos\left( \frac{7\pi }{4} \right)+i\ sin\left( \frac{7\pi }{4} \right) \right] \end{array}](https://tex.z-dn.net/?f=%5Cbf%20%283%2C3i%29%5Cimplies%20%0A%5Cbegin%7Barray%7D%7Bllll%7D%0Ar%5Bcos%28%5Ctheta%29%2Bi%5C%20sin%28%5Ctheta%29%5D%5C%5C%5C%5C%0A3%5Csqrt%7B2%7D%5Cleft%5B%20cos%5Cleft%28%20%5Cfrac%7B7%5Cpi%20%7D%7B4%7D%20%5Cright%29%2Bi%5C%20sin%5Cleft%28%20%5Cfrac%7B7%5Cpi%20%7D%7B4%7D%20%5Cright%29%20%5Cright%5D%0A%5Cend%7Barray%7D)
Answer:
V = 140 pi ft^3
Step-by-step explanation:
The volume of a cone is given by
V = 1/3 Bh where B is the area of the base
V = 1/3 (35 pi) * 12
V = 4*35 pi
V = 140 pi ft^3
We cannot approximate pi if we want the exact answer
