Your friend's heart beats 18 times in 15 seconds when at rest. while running, your friend's heart beats 25 times in 10 seconds.

you would have to sell 24 bracelets.

step-by-step explanation:

84/3.5 = 24

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 !