30 points + brainliest if correct! this year, 51 vehicles participated in the ride. the total number of tires of all the vehicles was 134. assuming that each car has 4 tires and each motorcycle has 2 tires, how many each of cars and motorcycles participated in the ride? a. 13 cars; 38 motorcycles b. 18 cars; 33 motorcycles c. 20 cars; 31 motorcycles d. 16 cars; 35 motorcycles

D. 16 Cars; 35 Motorcycles

Step-by-step explanation:

16*4= 64 Multiply the number of cars by the number of wheels a car has

35*2= 70 Multiply the number of Motorcyles by the number of wheels a Motorcycle has

Then add them--->  64+70= 134

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)