Answer:
x = -8
Step-by-step explanation:
Given the equation:
Note that
then
Rewrite the equation as
then
The solution is as follows:
Set up the proportion:
70% - 98
90% - x
70% / 90% = 98 / x
7 / 9 = 98 /x
(7 / 9) x = 98
x = 98 x 9/7
x = 14 x 9
x = 126
The answer is <span>D. 126.
I hope my answer has come to your help. God bless and have a nice day ahead!</span>
Newton's law of cooling states that under forced convection (which is assumed to be true), then
dT(t)/dt = -k(T(t)-Ta)..............(1)
T(t)=temperature
Ta=ambient temperature=40F
k=cooling constant = 0.1947
T(0)=98.6F (assuming victim did not have fever)
Integrate (1)
T(t)-Ta=(T(t)-T(0))e^(-kt)
Solve for t
(T(t)-Ta)/(T(t)-T(0)) = e^(-kt)
take log:
-kt=log_e((T(t)-Ta)/(T(t)-T(0)))
substitute T(t)=80F, Ta=40F,T(0)=98.6F
-kt=log_e((80-40)/(98.6-40))=-0.38186
t=0.38186/0.1947
=1.96, or almost 2 hours (assuming k=0.1947 is in hours)
Answer:
It is given that Rectangle Q has an area of 2 square units.
Thea Drew a scaled version of Rectangle Q and marked it as R.
As you must keep in mind If we draw scaled copy of pre-image, then the two images i.e Pre-image and Image are similar.
As you have not written what is the scale factor of transformation
Suppose , Let the Scale factor of transformation= k
Rectangle Q = Pre -image, Rectangle R= Image
If, Pre-Image < Image , then scale factor is k >1.
But If, Pre-Image > Image , then Scale factor will be i.e lies between, 0<k<1.
