The Standard Deviation is a measure of how spread out numbers are. Standard deviation can be calculated by the expression as follows:
s = √∑(x - x(mean))^2/n-1
x(mean) = 24
s = √∑(x - 24)^2 / 7-1
<span>s = 6.11
Hope this answers the question. Have a nice day.</span>
Answer:
look it up
Step-by-step explanation:
Answer:
the answer is A) -17
all you need to do is divide 8.5 ÷ -.5 to get -17
This question is the application of differential eqns in order to derive a model for the temperature dependence with time. Actually, a general equation has already been derived for this type of cases. This equation is known as the Newton's Law of Cooling. The equation is
(T - Ts) / (To -Ts) = e^(-kt)
where T is the the temperature at any time t
Ts is the surrounding temperature
To is the initial temperature
k is the constant
t is the time
several assumptions have been made to arrive at this form, i suggest you trace the derivation of the general formula.
First we need to look for k using the initial conditions that is @t = 1.5 min, T = 50 F
substituting we get a k = 0.2703
therefore @ t = 1 min, T = 55.79 F
@ T = 15 F the time required is 9.193 min.
Answer:
x = -6
Step-by-step explanation:
let's call the number x.
"five less than"
[expression] - 5
"the quotient of a number and 3"
x/3
x/3 - 5
"is -7"
x/3 - 5 = -7
<em>add 5 to both sides of the equation</em>
x/3 - 5 + 5 = -7 + 5
x/3 = -2
<em>multiply both sides of the equation by 3</em>
x/3 * 3 = -2 * 3
x = -6
