Given: The number of bacteria, B, in a refrigerated food is given by the function $b(t)=15t^2-60t+125$ , where t is the temperature of food in degrees Fahrenheit.

The function $t(h)=3h+4$ gives the temperature, t, of the food h hours after being removed from the refrigerator.

Now, the number bacteria in the food in h hours is given by:-

$b(t(h))=15(3h+4)^2-60(3h+4)+125\\=15(9h^2+16+24h)-180h-240+125\\=135h^2+240+360h-180h-240+125\\=135h^2+180h+125$

So, The number bacteria in the food in h hours is given by:

$b(t(h))=135h^2+180h+125$

4 0

2 years ago

How to solve this equation

Keith_Richards [23]

The answer to your equation is x=2.52

3 0

2 years ago

Read 2 more answers

If x+y is rational,must x and y each br rational?

aniked [119]

Answer:

No.

Step-by-step explanation:

$x$ and $y$ could be irrational and $x+y$ be rational.

Example:

Let $x=\sqrt{2}$ and $y=-\sqrt{2}$ .

And $x+y=\sqrt{2}+-\sqrt{2}=0$ and 0 is rational.

3 0

2 years ago

Read 2 more answers