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PSAT Math Videos 44 videos
PSAT 1.3 Math Narrative Walkthrough. How many full packages of secret ingredient does the company have to buy to make one 50-gallon batch?
PSAT 1.9 Math Diagnostic. What is the maximum size widescreen TV Abby can purchase?
PSAT 1.36 Math Diagnostic. If f represents the cost of his food, which of the following represents Jasper's order?
PSAT 1.40 Math Diagnostic 170 Views
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Description:
PSAT 1.40 Math Diagnostic. According to the equation, which of the following statements is accurate?
Transcript
- 00:00
Sorry And here's your smoke du jour Brought to you
- 00:04
by swimming pools There's a small rundown public school we
- 00:07
go to sometimes but it's kind of a dive splash
- 00:12
the local pool love opens with a thousand members at
- 00:15
the beginning of the summer The number of members m
Full Transcript
- 00:18
after tea months can be calculated with the equation and
- 00:21
nichols a thousand times point nine five to the t
- 00:23
kaur according to the equation which of the following statements
- 00:26
is accurate and hear the potential answer all right are
- 00:31
under increasing or decreasing that's they face Okay we'll splash
- 00:36
What a clever name for a pool club was like
- 00:38
water taken Anyway they must be doing something right because
- 00:42
they got a thousand members to sign up right out
- 00:44
of the gate Or you know right off the starting
- 00:46
block now were given an equation that expresses how many
- 00:49
members there are after a certain amount of time where
- 00:52
t represents time and equals the number of months Right
- 00:56
So it's team months all the answer choices look pretty
- 00:58
similar So the only thing we need to do is
- 01:00
figure out whether membership is going up or down and
- 01:02
by what percentage Why they signed up or why they
- 01:05
left is well none of our business So let's Plug
- 01:08
in a one for tea and see what happens Well
- 01:11
point nine five two the first power is just point
- 01:13
nine five it doesn't change and once we multiply that
- 01:16
by a thousand we get nine hundred fifty which is
- 01:18
a decrease of fifty members Find out how much of
- 01:21
a percent decrease that is We simply take fifty and
- 01:24
divided by the thousand we started with and we get
- 01:27
point Oh five or five percent sure appears to be
- 01:30
option c to us But let's try plugging it in
- 01:32
one more to make sure what's membership gonna look like
- 01:35
after two months while we can plug into for tea
- 01:38
Point nine five square in his point nine o two
- 01:40
five which one multiplied by a thousand equals nine hundred
- 01:43
two and a half that's forty seven and a half
- 01:45
fewer members than there were the month before And each
- 01:48
We're a little concerned about that half member How sharp
- 01:51
are those diving boards Well if we take forty seven
- 01:53
point five and we divide that by the number of
- 01:55
members there were at the end of one month nine
- 01:58
fifty We had point oh five or five percent once
- 02:01
again so yeah option c definitely got it right We'll
- 02:04
tell you who doesn't have it right This pool club
- 02:07
Apparently we're not sure what they're doing to drive people
- 02:10
away in such large numbers but it might have something
- 02:12
to do with their idea to introduce marine life and 00:02:14.94 --> [endTime] do some of the pools
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