math

Question 1

perimeter of equilateral triangle

Answer 1

P = 3s

Question 2

surface area of rectangular prism

Answer 2

2(wl + hl + hw)

Question 3

volume of rectangular prism

Answer 3

v = lwh

Question 4

surface area of a cylinder

Answer 4

SA = 2pirh + 2pir²

Question 5

volume of a cylinder

Answer 5

V = pir²h

Question 6

distance

Answer 6

d = s x t

Question 7

average speed

Answer 7

change in distance / change in time

Question 8

simple interest

Answer 8

A = P(1+rt)^t

Question 9

compound interest

Answer 9

A = P(1 + r/n)^nt

Question 10

log_b(x)=n

Answer 10

bⁿ=x

Question 11

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?

Answer 11

3x + 4x + 5x = 12x
12x = 2400
x = 200
5(200) = 1,000

Question 12

sum of interior angles

Answer 12

(n-2) x 180

Question 13

interior angle

Answer 13

(n-2) x 180/n

Question 14

exterior angle

Answer 14

360/n

Question 15

permutation

Answer 15

ORDER DOES MATTER

nPr = n! / (n-r)!

Question 16

combination

Answer 16

ORDER DOES NOT MATTER

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

Question 17

mutually exclusive events

Answer 17

cannot happen at the same time

P(A or B) = P(A) + P(B)

Question 18

non-mutually exclusive events

Answer 18

P(A or B) = P(A) + P(B) - P(A and B)

Question 19

mean

Answer 19

sum of total numbers / total number

Question 20

mode

Answer 20

values appearing the most

Question 21

Z score

Answer 21

(x - mean) / standard dev.

x = observed score