Each sunday, mario weighs himself. here are his weight changes over a 4-week period.
week 1 2 3 4
weight change –1.8 +0.9 –1.4 +0.4
how much has mario's weight changed over the entire 4 weeks?
a.
1.9 pounds
b.
–4.5 pounds
c.
–1.9 pounds
d.
4.5 pounds

yes, gavin is right.

step-by-step explanation:

gavin is correct. 

this problem is about converting 9% per year to how many percent per quarter. the rate is still the same. it only differed in the time period. so, through dimensional analysis,

9% per year  × (1 year / 4 quarters) = 2.25% per quarter

if he was asked to convert 9% per year to how many percent per quarter  compounded quarterly, then you will not simply divide by four. this is because compounding is not linear.

hope this , have a good day. c;

y∈r, 8> y≥0

hope i !

p.s the first bit only matters if you know what that means.

p.p.s brainliest would really