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SAT Math 3.4 Numbers and Operations 198 Views
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Description:
SAT Math 3.4 Numbers and Operations
Transcript
- 00:02
And here's your shmoop du jour...
- 00:04
Marlene needs to fill a 4-gallon bucket with water from a drinking fountain.
- 00:08
Apparently, she started a fire that needs to be put out.
- 00:11
Marlene only has a jar that holds 1.5 cups.
- 00:14
How many trips will she need to make to the fountain?
Full Transcript
- 00:17
And here are the potential answers...
- 00:21
Let's break down what the question is asking.
- 00:23
It's asking us to find the number of trips Marlene needs to make...
- 00:27
...but to find that number, we have to know how many cups are in a gallon.
- 00:31
Listen up.
- 00:32
There are four cups to a quart and four quarts to a gallon.
- 00:36
That makes 16 cups in a gallon
- 00:39
and 64 cups in 4 gallons. If Marlene's teensy tiny jar can hold 1.5
- 00:46
cups, and she needs to get 4 gallons worth of water, or 64 cups,
- 00:51
how many trips will she need to make?
- 00:54
We divide 64 by 1.5, and we get 42.6666666...and so on.
- 01:00
Ok, so 42.66 of Marlene's jars will carry 64 cups of water.
- 01:07
If Marlene makes 42 trips, then she'll only have 63 cups of water.
- 01:12
To make sure she has those 64 cups, she has to round up... and make 43 trip.
- 01:18
Our answer is E.
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