The answer is c; 14 hours
do 84 divided by 6 and you will get 14
40/9 *3/8=5/3 zThats the answer
A simple one is multiplication, say we have 12 people but 18 rows of chairs. That's an easy example
If you have a calculator with statistical functions, that's the way to go.
On my TI-83, I typed in invNorm(0.88) and got the result z = 1.17.
88% of the area under the normal curve is to the left of z = 1.17.