1. work out the area of a circle with radius 7.5 cm. take (pie) to be 3.142 and give your answer to 2 decimal places. 2. a semicircle has radius 8.2 cm. work out the area of the semicircle. take (pie) to be 3.142 and give your answer to 1 decimal place.

An automated water dispenser fills packets with one liter of water on average, with a standard deviation of 5 milliliter. the manual says that after a year of operation the dispenser should be tested to see if it needs recalibration. a year later a number of filled packets are set aside and measured separately. it is found that the average packet now contains about 0.995 liters. does the dispenser need calibration? explain your answer.

It says factor each expression 49x-28?

Need so much on this one how many yards?