Quantitative Reasoning Practice Test #1 (things you need to memorize)

Equation of a circle

(x-h)²+(y-k)²=r², (h, k) is the center, r is the radius.

formula for distance

speed x time

Area of a triangle

A=1/2bh

Rate Formula

Rate = Work/Time

normal distribution

0.5% | 2.5% | 13.5% | 34% | 34% | 13.5% | 2.5% | 0.5%

absolute value inequality rule

|x| < a <—-> -a < x < a

Add a number to each element, what happens to the mean and standard dev?

affects the mean but not the standard dev.

Multiply a number to each element, what happens to the mean and standard dev?

affects the mean and standard dev

Volume of a cube formula

s^3

Surface area of a cube formula

6s^2

y|x+a|

shifted left

y|x-a|

shifted right

y|x|+b

shifted up

y|x|-b

shifted down

Volume of a Cylinder Formula

V=πr²h

Combination Formula

nCr = n!/r!(n-r)!

Job formula

Rate x time

Union of two sets =

Contains elements of two sets WITHOUT repetition

Logb(x) = y

b^y = x

Area of equilateral triangle

A=(s²√3)/4