Fundamental theorem of calculus

tsal

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Sep 20, 2011
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This is a problem that I have looked to other sources to help me, but all they have done is just made me confused.
Snow is forming on the ground at a rate given by dy/dt = 2√t +1 inches per hour where y is the depth of the snow in inches at time t measure in hours since the snow started forming.

a)Use 4 left hand triangles to make under-approximation. Did that, no problem.

Suppose now that you are also given that y(t) = 4/3*t^3/2 +t. Use y to determine exactly how much snow fell between 2 hours anb 4 hours after the snow began to fall.

I guess I'm just confused about what to do with that equation. I think I was told that I have to change it to an integral and something about adding 1, but that doesn't make sense to me.

Thanks to any who are willing to help!
 
Nevermind, sorry. I figured out that you just have to plug in 4 and 2, then the answer for 4 - answer for 2 = 8.9 inches. The tutoring at college just doesn't help.
 
Suppose now that you are also given that y(t) = (4/3)t^(3/2) + t.

tsal,

you must have grouping symbols aroung the fractional
exponent,** and you should use them around the other
fraction. You may drop the asterisk.


** Otherwise that part is equal to (t^3)/2.
.
 
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