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Appropriate Units and Scales Videos 17 videos
Mathematical Reasoning Drill 4 Problem 1. Approximately how many gallons of paint is needed if eight people paint the wall together for an hour?
Mathematical Reasoning Drill 4, Problem 2. How many people failed to return the survey?
Mathematical Reasoning Drill 4, Problem 3. For approximately how long did the pie remain higher than the three-story building?
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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