At the city Museum, child admission is $6.50 an adult admission is $9.80. On Saturday, 130 tickets were sold for a total sales of $1033.10. How many child tickets were sold on that day?

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.

Twelve less than a number is at most 20

Complete the steps to find 4.830 ÷ 5