1. two students in different classes took the same math test. both students received a score of 87. in student a's class the mean was 78 and the standard deviation of 5. in student b's class the mean was 76 with a standard deviation of 4. which student scored in the top 10% of their class?
2. the scores on a final exam were approximately normally with a mean of 82 and standard deviation of 11. if 85 students took the exam, and above a 60 is a passing grade, how many students failed the exam?
answer:x = 21
the formula of a volume of a square pyramid:
a - edge of base
h - height
remember use pemdas! there are no parentheses or exponents so lets move onto the first part of the equation: multiplication and division. first, lets break the first part of the equation up into something easier using the distributive property. 28 * 12= (20 *12) + (8*12) you know that 20*12 is 240 and 8*12 is 96. add them and you get 336. then, lets solve the last part of the equation (the last part of pemdas is addition and subtraction). 336 plus 34 is 370. hope this !
24.38 meters to the nearest hundredth.
1 foot is approximately 30.48 cm.
so 80 feet = 80 * 30.48 cm.
in meters this is (80 * 30.48) / 100
= 24.38 m.
29.99 * .20= 5.998
29.99- 5.998 = she payed 23.99
25* .10= 2.50
25-2.50= he payed 22.50
therefore he got the better deal