at the school carnival reva sees a 6-l jar filled with marbles. the person who comes closest to guessing the number of marbles wins a bike. reva tries an expeirment and finds that 70 marbles can be placed in 250-ml cup. how many marbles should she guess are in the jar?
"... Reva sees a 6-l jar filled with marbles....Reva tries an experiment, and finds that 70 marbles can be placed in 250-ml cup. How many marbles should she guess are in the jar?"
There is one significant digit in the "70 marbles" observation. Let's assume, therefore, that 70 ± 5 marbles can fit inside the 250-ml cup. Let us further assume that the 250-ml cup holds exactly 250.00 ml. Then:
(6 liters) x (70 ± 5 marbles per ¼-liter) = (6 liters) x (260 to 300 marbles/liter) = 1560 to 1800 marbles.
My experience says that there are 290 marbles per liter in a typical jar, so, MY answer of 6 x 290 = 1740 marbles is consistent with Reva's observations.
Answer: 1740 marbles.
1,000 ml = 1 liter
6,000 ml = 6 liters
(6,000/250) * 70 = ?
To answer this question, we need to calculate the number of marbles in the 6-liter jar based on the experiment conducted by Revs.
First, let's convert the cup's volume into liters:
250 ml = 0.250 liters
Now, we can determine how many cups fit into the 6-liter jar:
6 liters / 0.250 liters = 24 cups
Next, we calculate the number of marbles in 24 cups:
24 cups * 70 marbles = 1680 marbles
So, Revs should guess that there are 1680 marbles in the jar.