math Flashcards
1
Q
perimeter of equilateral triangle
A
P = 3s
2
Q
surface area of rectangular prism
A
2(wl + hl + hw)
3
Q
volume of rectangular prism
A
v = lwh
4
Q
surface area of a cylinder
A
SA = 2pirh + 2pir2
5
Q
volume of a cylinder
A
V = pir2h
6
Q
distance
A
d = s x t
7
Q
average speed
A
change in distance / change in time
8
Q
simple interest
A
A = P(1+rt)t
9
Q
compound interest
A
A = P(1 + r/n)nt
10
Q
logb(x)=n
A
bn=x
11
Q
the ratio of books in rooms is A + B + C is 3:4:5. if all three rooms have 2,400 books, how many books does room C have?
A
3x + 4x + 5x = 12x
12x = 2400
x = 200
5(200) = 1,000
12
Q
sum of interior angles
A
(n-2) x 180
13
Q
interior angle
A
(n-2) x 180/n
14
Q
exterior angle
A
360/n
15
Q
permutation
A
ORDER DOES MATTER
nPr = n! / (n-r)!
