Answer: 7/12
Step-by-step explanation: For medium: there are 4 different colors. For red: There are three sizes, therefore 4+3=7, So 7/12
Answer:
-4 i think
Step-by-step explanation:
divide -12 by 3 to get -4
Answer:
i am only looking for answers on this app
Sir Step-by-step explanation:
Answer: The function is M(t) = 40mg*0.992^t
Step-by-step explanation:
Half life refers to the time that a given quantity to reduce to half its initial value.
This is usually a exponential decay, so we want a function of the form:
M(t) = A*r^(*t)
Were t is time, in this case, t is the number of days
A is the initial value
r is the rate of decrease, we will find that for exponential decays r must be a number between 0 and 1. If r is closer to 0, we will have a fast exponential decay, if r is closer to 1 we will have a slower exponential decay.
We have that the initial mass is 40mg, this is at t = 0.
M(0) = A*r^(0) = A = 40mg
So now we have the value of A.
Now, we know that in t = 84, the mass of the substance will be half its initial value, so it will be:
A/2 = 40mg/2 = 20mg
this means that:
M(84) = 40mg*r^(84) = 20mg
r^(84) = 20mg/40mg = 1/2
= 0.992
Then the equation is:
M(t) = 40mg*0.992^t
Answer:
x = 115
Step-by-step explanation:
The chord- chord angle x is half the sum of the arcs intercepted by the angle and its vertical angle, that is
x = (145 + 85) = 0.5 × 230 = 115