Houston got a summer job with his friend Nelson. The both work by cutting grass. At the end of the summer both boys wanted to save 2400 together to buy themselves a car. At the end of the summer Houston had lost half of his earnings which was 1800. They were still able to save enough money to reach 2400. How much did Nelson save?

The decibel level of sound is 50 db greater on a busy street than in a quiet room where the intensity of sound is watt/m2. the level of sound in the quiet room is db, and the intensity of sound in the busy street is watt/m2. use the formula , where is the sound level in decibels, i is the intensity of sound, and is the smallest sound intensity that can be heard by the human ear (roughly equal to watts/m2).

Which is equivalent to 10/12? options: 10/18 5/6 3/12 9/11

What is the 17th term in the arithmetic sequence in which a6 is 101 and a9 is 83