C²-4 Which expression is equivalent to
C+3
13.03.2012
?
C+3
C+2
62-4 3(02-9)
O c²-4 3(0²-9)
C+3
C+2
c² – 4
31c2-9)
C+3
C+2
C+3
C+2
82-4 3[c2-9)

12cm

the answer is d

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.

click to let others know, how is it

0.0

0 votes

1

report

read more on -

step-by-step explanation:

actually your concept is wrong

step-by-step explanation:

150% of x =300

150x=300×100

x=(300×100)÷150

x=200