Unit 3 | lesson 9
lesson assessment: multiplication and division applications, part 1 quiz
question navigator
4.
solve the word problem.
the formula d = rt gives the distance traveled in time t at rate r. a bicyclist rides for 1.5 hours and travels 25 miles.
what was her average speed?
a.
16.7 miles per hour
b.
23.5 miles per hour
c.
26.5 miles per hour
d.
37.5 miles per hour

answer: given that the roller coaster can accommodate 1600 riders per hour, thus the roller coaster can accomodate 1600 / 60 = 26.67 riders per minute.

given that there are 345 people in the line, the number of minutes it will take for the 345 persons to get into the roller coaster is given by 345 / 26.67 = 12.94 minutes.

therefore, it will take you 12.94 minutes to get to the front of the line.

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)