A company has 50 employees all working in the same building. As part of their safety procedures, a fire drill is carried out with the total number of employees who have left the building recorded every 10 seconds. The results are displayed in the cumulative frequency diagram below.
The company has the following policy: 'in the even of a fire, at leat 90% of the employees must have left the building within 1 minute.'

Did the fire drill procedure meet the policy above?
You must show all your working.

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.

square pyramid

step-by-step explanation:

square prism looks like nothing like that

triangular prism has a rectangular base instead of a square base

tetrahedron has a triangular base

1. 3. can also be expressed as (22/7)

2. -4.5

3. 3.6

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