The price of a computer component is decreasing at a rate of 12% per year. state whether this decrease is linear or exponential. if the component costs $80 today, what is the cost in 3 years?

Answer

The price of a computer component is decreasing at a rate of 12% per year.  

Solution

The original price is decreased by consistent rate over a period of time, the decrease is said to be exponential.

In this problem It is an exponential decrease.

If the component costs $80 today,

After one year its cost =80x (88/100)  

After 2nd year its cost =80x (88/100) x(88/100)

After 3rd year its cost =80 x(88/100) x 88/100) =$54.52

We are told that the price of a computer component is decreasing at a rate of 12% per year.

We can see that our decrease is exponential as price of our component are decreasing by a consistent rate every year.

Let A be the price of our computer component after t years. We can write an exponential equation from our given information as:    

Upon substituting t=3 in our equation we will get,

Therefore, the cost of computer component after 3 years will be $54.52.

i believe the answer is letter c) 8

step-by-step explanation:

hello,

b) 62.47% of the students are between 14 and 18 years old.

step-by-step explanation:

mean = 15 and standard deviation = 2

student between 14 to 18

formula used z-score

for age 14 , z score

using z-table , p(z> -0.5)=0.3085

for age 18 , z score

using z-table , p(z< 1.5)=0.9332

p(-0.5< z< 1.5)=0.9332-0.3085 = 0.6247

thus, 62.47% of the students are between 14 and 18 years old.

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