Aswimming pool is open for 7 1/2 hours a day. the pool keeps one life guard on duty at a time, and each life guard shift is 1 1/2 hours long. how many shift per day?

There are 5 shifts per day

Solution:

Given that, A swimming pool is open for hours a day

The pool keeps one life guard on duty at a time

Each life guard shift is hours long

To find: Number of shifts per day

From given,

Therefore, number of shifts per day is found by dividing total number of hours by hours of each life guard shift

Substituting the values we get,

Thus there are 5 shifts per day

it’s supposed to be -4+45=41

step-by-step explanation: