A treadmill cost $2.199 with 6.3% sales tax

$2337.54

Step-by-step explanation:

100%+6.3%=106.3%

106.3%=1.063

1.063×2199=2337.537

So when you round it the answer will be $2337.54.

answer: first option i.e. 'a' is correct.

step-by-step explanation:

since we have given that

number of minutes to wrap a small gift box = 4 minutes

we need to find the number of gifts to be wrapped in 5 minutes

since there is a direct variation, as the number of minutes will increase with   number of gifts to be wrapped.

so, let the number of gifts to be wrapped in 5 minutes be x.

so, it becomes,

hence, first option 'a'   is correct.