Over a period of 12 hours, the temperature dropped 60 degrees. What was the average change in temperature in one hour? Group of answer choices

15

-15

5

-5

3× __ -2=15 7 2× __+1=7 5 7× =22 15 5× __+10=2 8 × __+4=20 6 × =10 3 × __+2=8 6 × __+8=8 9 × __+7=20 6

Which shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+1

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.