An ice machine uses 3 gallons of water every 9 hours. How many gallons of water does it use each hout? How many hours does it take
to use one gallon?
A)
gallon per hour 1 hour
B)
gallon per hour; 3 hours
3 gallons per hour;
hour
D)
gallon per hour; hour

Afurniture manufacturer produces chairs and sofas. each chair requires 10 yards of fabric, and each sofa requires 20 yards of fabric. the manufacturer has 300 yards of fabric available. to fulfill orders, the number of sofas must be at least twice the number of chairs. let x be the number of chairs and y the number of sofas. which inequalities are described in the problem? check all of the boxes that apply

Write the fraction 9/50 as a decimal if needed round to the nearest hundredth

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?