Heights of ten year old boys (5th graders) follow an approximate normal distribution with mean inches and standard deviation
inches.1

(a) According to this normal distribution, what proportion of 10-year-old boys are between 4 ft 3.5 in and 5 ft 0.5 in tall (between 51.5 inches and 60.5 inches)?
Proportion:

(b) A parent says his 10-year-old son is in the
th
percentile in height. How tall is this boy?

Round your answer to two decimal places.

Height:

75 tickets have been sold so far.

step-by-step explanation:

in this question it is clearly mentioned that 45 children's tickets have been sold and this number is 60% of the total tickets sold.

now let's assume the total number of tickets sold be x.

then 60% of x = 45

⇒

⇒ x(.6) = 45

by dividing with .6 on both the sides of the equation

⇒ x = 75

therefore 75 tickets have been sold so far.

hope it you

step-by-step explanation:

sin(7pi/6 - pi/3)  

= sin(7pi/6 - 2pi/6)  

= sin(5pi/6)  

= sin(pi - pi/6)  

= sin(pi/6)  

= 1/2  

sin 7pi/6 - sin pi/3  

= sin (pi + pi/6) - sin pi/3  

= -sin pi/6 - sin pi/3  

= -1/2 - sqrt(3)/2  

= -(1+sqrt(3))2

345

step-by-step explanation: