QR Formula Sheet Flashcards
1 mile
5280 ft
1 foot
12 inches
1 yard
3 ft
1 meter
1.1 yards
1 kilogram
2.2 pounds
1 pound
16 ounces= 454 grams
of
multiplication
equal to
equal sign
dilutions
c1v`=c2v2
distance
(rate)(time)
average rate
total distance traveled/total time
when 2 things travel toward each other
add the 2 velocities together
Two trains are 135 miles apart. Train 1
is heading east at 50 mph. Train 2 is heading
west at 40 mph. How long before the trains cross
paths?
Compound Interest
If the interest is compounded quarterly (every 3 months), and the length of the investment is one year, (t = 1 year) and (n = 4).
Simplified Interest Formula
When the interest is compounded one time per
unit “t” (n =1).
Example: If the interest is compounded yearly, and
the length of the investment is five years,
(t = 5 years) and (n = 1).
∪ =
union. Includes all data but excludes
duplicate values.
Example: A = {1,2,3} and B = {1,3,4}
A ∪ B= {1,2,3,4}
∩ =
intersection. Includes only data that exists in both A and B.
Example: A = {1,2,3} and B = {1,3,4}
A ∩ B= {1,3}
Combined Work Questions
If Tom gets a job done in 4 hours (t1)
and Jerry gets it done in 3 hours (t2), how many hours does it take to get the job done working
together (ttotal)?
Use combination when the order
DOES NOT MATTER
use permutation when the order
does matter
combination formular
n = number of objects from which you can
choose
k = number of objects to be chosen
permutation formula
n = number of objects from which you can
choose
k = number of objects to be chosen
rolling 2 dice
total number of possible combinations = (6)(6) = 36
What is the probability of rolling two
dice and having the two numbers add to 4?
How many ways can the letters in
APPALOOSA be arranged?
A standard deck has:
What is the probability of pulling 3
spades in a deck without replacement?
mean
average
medianb
middle number of a set of data (remember to order them numerically and then find the middle number)
mode
number that occurs most often in a set
standard deviation
measure of how spread out numbers are
variance
average of the squared differences from the mean
z score
measure of standard deviation
The standard deviation of {10, 15, 20, 25, 30} can be best approximated by which of the following?
In a normal distribution, 68% of the data fall within
1 SD of the mean
95% of
the data fall within
2 standard deviations of the mean
99.7% of the data fall within
3 SD of the mean
area of circle
area of triangle
area of sphere
area of cylinder
area of paralleogram
volume of sphere
volume of cylinder
[Line Formulas]
parallel lines
Slopes are equivalent (ex: 2 and 2)
[Perpendicular lines]
Slopes are negative
reciprocal (ex: 1⁄4 and -4)
[Distance between two points]
Quadratic Equations
[Vertex of a parabola]
