Answer:
h = -7
Step-by-step explanation:
- 3 = h + 4
- 3 - h = 4
- h = 4 + 3
- h = 7
9514 1404 393
Answer:
5.8496 min
Step-by-step explanation:
![\displaystyle t=\frac{10}{\ln{2}}\int_{220}^{280}{\frac{1}{T-100}}\,dT=\frac{10(\ln{(280-100)}-\ln{(220-100)})}{\ln{2}}=\frac{10\ln{(3/2)}}{\ln{2}}\\\\\boxed{t\approx5.8496\quad\text{min}}](https://tex.z-dn.net/?f=%5Cdisplaystyle%20t%3D%5Cfrac%7B10%7D%7B%5Cln%7B2%7D%7D%5Cint_%7B220%7D%5E%7B280%7D%7B%5Cfrac%7B1%7D%7BT-100%7D%7D%5C%2CdT%3D%5Cfrac%7B10%28%5Cln%7B%28280-100%29%7D-%5Cln%7B%28220-100%29%7D%29%7D%7B%5Cln%7B2%7D%7D%3D%5Cfrac%7B10%5Cln%7B%283%2F2%29%7D%7D%7B%5Cln%7B2%7D%7D%5C%5C%5C%5C%5Cboxed%7Bt%5Capprox5.8496%5Cquad%5Ctext%7Bmin%7D%7D)
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Modern calculators can perform integration with high accuracy. This one gives the same result.
Answer:
1. (3,-3)
2. x=3 x=-2
Step-by-step explanation:
Plug it into the equation one number at a time.