Answer:
A. 89.07
Step-by-step explanation:
A kilogram = 2.20462
40.4 kilograms = 40.4 X 2.20462
89.066648
Nearest hundreth = 89.07
Answer:
11cm
Step-by-step explanation:
C=
d
34.54cm=d
d=34.54cm/
d=11cm (aprrox.)
B
Step-by-step explanation:
This is the concept of algebra, to solve the expression we proceed as follows;
cos 2x-cosx=0
cos 2x=cosx
but:
cos 2x+1=2(cos^2x)
thereore;
from:
cos 2x=cos x
adding 1 on both sides we get:
cos 2x+1=cos x+1
2(cos^2x)=cosx+1
suppose;
cos x=a
thus;
2a^2=a+1
a^2-1/2a-1/2=0
solving the above quadratic we get:
a=-0.5 and a=1
when a=-0.5
cosx=-0.5
x=120=2/3π
when x=1
cos x=1
x=0
the answer is:
x=0 or x=2/3π
