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PSAT Math Diagnostic Videos 41 videos
PSAT 1.10 Math Diagnostic. Which of the following is a factor of the expression?
PSAT 1.3 Math Diagnostic. Which of the following most nearly represents the line of best fit?
PSAT 1.4 Math Diagnostic. Which of the following conclusions is supported by the data in the graph?
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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