How many liters are 21 cups 1 l=4.2 cups 21 cups=

Which is the graph of f(x) = (4)x? image for option 1 image for option 2 image for option 3 image for option 4

The dolphins at the webster are fed 1/2 of a bucket of fish each day the sea otters are fed 1/2 as much fish as the dolphins how many buckets of fish are the sea fed each day? simplify you answer and write it as a proper fraction or as a whole or mixed number

What is the value of x? enter your answer in the box.