Claim sizes range between 0 and 1500. The probability that a claim is no greater than 500 is 0.8. Claim sizes are uniformly distributed on (0; 500] and on (500; 1500]. Calculate the expected claim sizes and its variance

Kathy spent 5/8 of her money on books and another 1/6 of her money on stationeries.what fraction of kathy’s money was left?

Thales was an ancient philosopher familiar with similar triangles. one story about him says that he found the height of a pyramid by measuring its shadow and his own shadow at the same time. if the person is 5-ft tall, what is the height of the pyramid in the drawing?

Can someone tell me if this is perpendicular? !