The digital display of a caliper, a device used to measure the distance used to measure the distance between one end of an object and the opposite end reads forty-three and eight hundred sixty-five thousandths millimeters. what is this number written as a decimal numeral

The jewelry store is having a sale. necklaces that were regularly priced at $23.50 are on sale for $18.80. what is the percentage of decrease in the price of necklaces?

Can someone check if i did this correct. it’s number 4 if you’re wondering.

Angle xyz is formed by segments xy and yz on the coordinate grid below: a coordinate plane is shown. angle xyz has endpoints at 3 comma negative 1 and 6 negative 2 and 3 comma negative 3 and measures 36.87 degrees. angle xyz is rotated 270 degrees counterclockwise about the origin to form angle x′y′z′. which statement shows the measure of angle x′y′z′?