Answer:
The answer is below
Step-by-step explanation:
A shop contained some refrigerators and televisions. The total number is 800, and 45% of them were refrigerators. If 60% of refrigerators were sold and 65% of televisions were sold last week. How many fewer refrigerators were sold than televisions?
Solution:
The number of refrigerators = 45% of 800 = 0.45 * 800 = 360 refrigerators.
The number of televisions = 800 - 360 = 440 televisions.
number of refrigerators sold = 60% of 360 = 0.6 * 360 = 216 refrigerators
number of televisions sold = 65% of 440 = 0.65 * 440 = 286 televisions
The number of fewer refrigerators that were sold than televisions = 286 - 216 = 70
1. -8x = 3x
-11x = 0
x= 0
y= 3(0)= 0
(0, 0)
2. -7x = -4x - 12
-3x = -12
x = 4
y = -7(4)= -28
(4, -28)
807 divided by 7 = 115.2857143
Answer:
D
Step-by-step explanation:
Answer:
B. A(r(t)) = 25πt²
Step-by-step explanation:
Find the completed question below
The radius of a circular pond is increasing at a constant rate, which can be modeled by the function r(t) = 5t where t is time in months. The area of the pond is modeled by the function A(r) = πr². The area of the pond with respect to time can be modeled by the composition . Which function represents the area with respect to time? A. B. C. D.
Given
A(t) = πr²
r(t) = 5t
We are to evaluate the composite expression A(r(t))
A(r(t)) = A(5t)
To get A(5t), we will replace r in A(t) with 5t and simplify as shown
A(5t) = π(5t)²
A(5t) = π(25t²)
A(5t) = 25πt²
A(r(t)) = 25πt²
Hence the composite expression A(r(t)) is 25πt²
Option B is correct.
