$[-/1$ Points$]$

ZILLDIFFEQMODAP$123\mathrm{.}1\mathrm{.}019.0/100$ Submissions Used

A thermometer reading ${65}^{**}$ F is placed in an oven preheated to a constant temperature. Through a glass window in the oven doac, an observer records that the thermometer resols ${110}^{**}F$ after $\frac{1}{2}$ minute and $145F$ after $1$ minute. How hot is the oven?

$*$ F

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$5.[-/1$ Points$]$

$$ ZILLDIFFEQMODAP$123,1,025.$ O$/100$ Submissions Used

A large tank is filled to capacity with $700$ gallons of pure water Brine containing $5$ pounds of sait per gallon is pumped intes the tank at a rate of $7$ gailmin. The well$-$mined soluson is purned out at the same rate. Find the number $A(t)$ of pounds of salt in the tank at time $t.$

$A(t)=$ ib

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$0\mathrm{.}9701$

$4\mathrm{.}10158$

$729$

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