In the standard form of the equation
The middle line =k
For our given problem
f(t) = 40cos (80t + 20)
On comparison we get k=0
Hence middle line=0
Answer:
B
Step-by-step explanation:
Base area = (base x width) = 20 x 18 = 360 cm^2
Base perimeter = (base + width) x 2 = (20 + 18) x 2 = 76 cm
lateral surface = (base perimeter x height) = 76 x 15 = 1140 cm^2
Surface area = (base area x 2) + lateral surface = (360 x 2) + 1140= 1860 cm^2
surface area of a single prism = 1860 / 2 = 930 cm^2
Answer:
r = 5.4
Step-by-step explanation:
Formula:
P = πr + 2r
27.756 = πr + 2r
27.756 = 3.14r + 2r
27.756 = 5.14r
r = 5.4
???? Can you show the picture because I am really confused just by those numbers and words