4. Educational psychologists study memory, and have found a mathematical model that describes students' retention of material learned. Students take a test, and after some time
(t) without reviewing they take an equivalent test. The function a(t) describes students'
retention, a(t) = 78 – 12 log(t + 1) where a is the average score at time t where t is the
time in months since they first took the test.
a. What was the average score when students first took the test (t = 0)?
b. What is the average score after 6 months?
C. After how many months is the average score 60?

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value

his chances of getting a coin of higher value is 4/19

step-by-step explanation:

proofs involving isosceles triangles often require special consideration because an isosceles triangle has several distinct properties that do not apply to normal triangles.(more about triangle types) therefore, when you are trying to prove that two triangles are congruent, and one or both triangles, are isosceles you have a few theorems that you can use to make your life easier.

step-by-step explanation:

an isosceles triangle has two congruent sides and two congruent angles. the congruent angles are called the base angles and the other angle is known as the vertex angle. ∠bac and ∠bca are the base angles of the triangle picture on the left. the vertex angle is ∠abc

75%

step-by-step explanation: