What difficulties do using non-standard units present for introducing measurement? What are the advantages of using non-standard units to introduce measurement? Please help ASAP!!!

Brainlest answer can you find the area and circumference of a circle given the radius or diameter? if its yes or no explain why

Lv beethoven software supplies customized software to a managed healthcare system. lv beethoven software's costs for the software is $1,723,000. lv beethoven software sells the software to the healthcare system for $3,816,981.10. overhead expenses are estimated at 47% of the selling price. what is lv beethoven software's net profit to the nearest dollar?

In need of in the diagram, ∠abc is a right angle. ∠dbc = 30°27'40". find the measure of ∠abd.