C) Ms. Applewhite needs to drive 210 miles to get to Washington, D. C. She has already driven 60 miles. If she drives 30 miles per hour, how many more hours will she have to drive? Write and solve an equation.

Answer is in the photo. I couldn't attach it here, but uploaded it to a file hosting. link below! Good Luck!

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5 hours

Step-by-step explanation:

210-60=150

150/30=5 hours

2

step-by-step explanation:

vvvvv

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)