As been found that scores on the Writing portion of the SAT (Scholastic Aptitude Test) exam are normally distributed with mean 484 and standard deviation 115. Use the normal distribution to answer the following questions. (a) What is the estimated percentile for a student who scores 450 on Writing?

Round your answer to the nearest integer.

The estimated percentile for 450 is

(b) What is the approximate score for a student who is at the
th
percentile for Writing?

Round your answer to the nearest integer.

The
90th percentile is the score of

step-by-step explanation:

1. practice, practice & more practice

2. review errors

3. master the key concepts

do not try to memorise the processes.

4. understand your doubts.

5. create a distraction free study environment

6. create a mathematical dictionary

7. apply maths to real world problems.

let x and 400 - x be the two numbers.  

==> 0.80x + 0.85(400 - x) = 400 - 68 from the statement of the problem.  

< ==> 0.80x + 0.85(400 - x) = 400 - 68  

==> 340 - 0.05x = 332  

< ==> -0.05x = -8 ==> x = 160, the first number ==> 400 - x = 240, the second number.

y= -2x+4, have a great day

62 years old thats how old the man or women is