Let radius be r initially
so circumference initially= 2rpi
when r is doubled,
radius = 2r
so circumference in the end= 4rpi
how many folds of increase? =4rpi/2rpi=2 times increase
Use photomath’s calculator
Answer:
a)3.50
b)okay?
i)37.80
ii)3.15
Step-by-step explanation:
Answer:
y=-3/4x-2
Step-by-step explanation:
y=mx+b form (slope intercept form)
1) find slope
(4,-5) and (-4,1)
1-(-5)=6
-4-4=-8
m=6/-8 or 3/-4
y=-3/4x+b
Plug a coordinate in y=mx+b. Plug either (4,-5) or (-4,1)
in this case, I'll plug in (4,-5).
-5=-3/4(4)+b
Note that I substituted the y and x variables in place of one of the coordinates.
find b=-2.
Result: y=-3/4x-2
Answer:
the probability that system’s failure is due to the radio =
Step-by-step explanation:
From the question given;
Let the mean lifetime of the radio and the mean lifetime of the speaker
we can re-write both expressions as:
and
Let consider to be the variables which are independent to the exponentially distributed mean of
∴
replace the values now; we have:
Thus, the probability that system’s failure is due to the radio =