Costs for standard veterinary services at a local animal hospital follow a Normal model with a mean of $80 and a standard deviation of $20. 20% of bills are for less than what $ amount? (round to the nearest hundredth)

Were is the diagram?

Hello! i hope this
since the cosine is the ratio of the adjacent side to the hypotenuse, you can see that cos 60° = ½. answer. according to the property of cofunctions (topic 3), sin 30° is equal to cos 60°. sin 30° = ½.

If is was sunny on thursday, chances are that it will be a sunny if friday depending on the degrees and temperature. your welcome!