How long does a 420-miles trip take moving at 50 miles per hour?

a. 4 hours
b. 6 hours and 24 minutes
c.8 hours and 24 minutes
d. 8 hours and 30 minutes

D

Step-by-step explanation:

420/50= 8.4

which means 8 hours and 40 min so I'm going to say D b/c it the closest to my answer

  about 5.6 days

step-by-step explanation:

we can fill the given information into the decay equation and solve for the value of t at which half the sample remains.

the half-life is about 5.6 days.

b. 18

step-by-step explanation:

so the equation for this is:

ab^2=ac⋅ad

ab being the top length of 6 and ac being the length of 2 and ad being the length of x. let's plug into the equation:

6^2 = 2x

now lets just solve for x:

36 = 2x

18 = x

i hope that !