Enable contrast version

# Tutor profile: Xinyuan (Christine) Z.

Inactive
Xinyuan (Christine) Z.
NYU Junior Student
Tutor Satisfaction Guarantee

## Questions

### Subject:Basic Math

TutorMe
Question:

48 / 2(9+3)=?

Inactive
Xinyuan (Christine) Z.

The question seems simple but is actually not. The answer is 288, but not 1. It's about order of operations in math.

### Subject:Mandarin

TutorMe
Question:

__ 他比我大一岁， __ 我的辈分比他大。 a. 不但…而且　b. 虽然…可是　c. 因为…所以　d. 既然…那就

Inactive
Xinyuan (Christine) Z.

The answer should be B. "他比我大一岁" means "he is one year older than me". "我的辈分比他大" means "my position in the family hierarchy is higher than him." There is a transition, so the answer should be, which is "Although...but...".

### Subject:Calculus

TutorMe
Question:

A jet accelerates along the runway and takes off. It consumes fuel at a rate of f (t) = t2 /￼(t +1)^3kL per minute. How much fuel does the jet consume in the first 3 minutes?

Inactive
Xinyuan (Christine) Z.

By the Evaluation Theorem, the amount consumed from t=0 to t=3 minutes is 􏰅[integration 0 to 3, t^2/(t+1)^3 dt]. We make the substitution u = t + 1 to make the denominator nicer, then we expand. 􏰅[integration 0 to 3, t^2/(t+1)^3 dt] = ln(4)-32/32=0.355 KL

## Contact tutor

Send a message explaining your
needs and Xinyuan (Christine) will reply soon.
Contact Xinyuan (Christine)