Jenny is saving for a trip to Japan. She has $2800 saved already. She takes a part-time job that pays $22 per hour. How many hours will she have to work at her part-time job to raise $5000 for her vacation?

Jenny has to work 100 hours.

Step-by-step explanation:

we are given a rate (or rather slope) of 22 per hour and the y-intercept of 2800, so we can set up an equation where h = hours worked and s = savings

we get:

s = 22h + 2800

now we can plug in 5000 for s so we can figure out how many hours she needs to work

5000 = 22h + 2800

2200 = 22h

h = 100

Jenny has to work 100 hours.

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)

-2 is the right