In a hostel of 50 girls food provision is 40 days. if 30 girls are added how long will the provision last

Awater holding tank measures 105 m long, 50 m wide, and 8 m deep. traces of mercury have been found in the tank, with a concen- tration of 60 mg/l. what is the total mass of mercury in the tank? answer in units of kg.

What is the 9th term in the geometric sequence described by this explicit formula? an=-6. (2)(n-1) apex

Light travels at 186,000 miles per second. light takes about 1 1? 3 seconds to travel from the earth to the moon. calculate the distance between the earth and the moon based on the speed of light.