Answer:
Therefore there's a 99.99% probability the motherboard of your new computer will last for at least 15 years.
Step-by-step explanation:
This is the general idea to solve the problem.
Suppose that the mean and variance of the your distribution are .
respectively. Then, according to the problem you are looking for the probability.

Consider then the following random variable.

Using the central limit theorem
distribution will be close to normal, and its mean and variance will be
, respectively. Therefore you just have to find the probability that a normally distributed random variable with that mean and that variance which I just mentioned is less than 14.
For this case we have that

Then you have that

and we have that if
is a normally distributed random variables with mean 280 and variance 70 we have that

the actual probability we are looking for is

Therefore there's a 99.99% probability the motherboard of your new computer will last for at least 15 years.
Answer:
the desired equation is y = 3^x
Step-by-step explanation:
if x = 2, then y = 9, and 9 is 3². If x = 4, y = 81 = 3^4.
Therefore we can conclude that the desired equation is y = 3^x
Answer:
Therefore the measure of∠ A is 60.07.
Step-by-step explanation:
Given:
In Right Angle Triangle ABC
∠ B = 90°
BC = 13 ....Side opposite to angle A
AC = 15 .... Hypotenuse
To Find:
m∠A = ?
Solution:
In Right Angle Triangle ABC ,Sine Identity,

Substituting the values we get

Therefore the measure of∠ A is 60.07
1/3y=x
3•1/3y=3x
y=3x
Hope this helped, if it did, I would really appreciate it if you can give me brainliest
This is true
Perpendicular lines = circumscribe
angle bisect = incircle
altitude = orthocenter
median = centriod