Answer:
Step-by-step explanation:
Given the function f(m)=20-0.25m to represent the amount of money f(m) she has left after talking m minutes, the zero of the equation can be gotten by setting f(m) to 0
f(m)=20-0.25m
0 =20-0.25m
-20 = -0.25m
m = -20/-0.25
m = 80
Hence Trudy will have talked for 80minutes if she has no money left
1. Use Difference of squares: a^2-b^2=(a+b)(a-b)
(x+k)(x-k)=0
2. Solve for x and k
x=+-k
k=+-x
Answer:
area = 100.5 in²
Step-by-step explanation:
area = 13.4 x 7.5 = 100.5 in²
Answer:
The answer is volume= 1272
Step-by-step explanation:
volume of a cylinder= pi (3.14)*r^2*h
3.14*9^2*5, 3.14*81*5= 1271.7 when rounded is 1272
