If 7 coins are tossed, how many outcomes are there?

128 outcomes

Step-by-step explanation:

No. of outcomes for a coin is given by :

2^n [where n is the number of times a coin is tossed]

=> 2⁷

=> 2 x 2 x 2 x 2 x 2 x 2 x 2

=> 4 x 4 x 4 x 2

=> 16 x 8

=> 128

7 coins are tossed, each coin has two possibilities therefore total number of possibilities are 2^7 = 128. The possibilities of obtaining 4 heads and 3 tails is 7C4 = 7C3 = 35.

2 x t divided by n

step-by-step explanation:

step-by-step explanation:

the original amount doesn't ''re just looking for the time it takes for 1/2 of the substance to we have

(1/2) =)     take the ln   of both sides

ln (1/2)   = )   and we can write

ln(1/2) = ) lne     and lne   = 1     so we have

ln(1/2) = -.1092t     divide both sides by -.1092

t = ln(1/2)/-.1092 = about 6.347 days = about 6.3 days (rounded)