What is the product of 4100 and 4.5 x 10^6 expressed in scientific notation

Afarmer sells 9.5 kilograms of apples and pears at the farmer's market. 4/5 of the weight is the apples and the rest is the pears. how many kilograms of pears did she sell at the farmers market

What is not true about kl and mn? what is mn? (show )

Show your workcan a right triangle have this sides? *how to prove it without using the pythagorean theorema*