Hi guys, i'm new here and i'm not english native, so my math english could be bad, anyway, my question refers to this pic. why if i choose to put t=5x i have to put 1/sqrt(5) outside the integral? i can't understand this for your answer

f is the midpoint of

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.

believe it or not anna is correct good job anna give me a fist bump there u go gal