He number of bacteria in a refrigerated food product is given by N(T)=23T^2−56T+1, 3

where T is the temperature of the food. When the food is removed from the refrigerator, the temperature is given by T(t)=5t+2.5, where t is the time in hours.

a. Find the composite function N(T(t)).

b. Find the time when the bacteria count reaches 6,752.

Round your answer to two decimal places.

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step-by-step explanation:

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x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

idk

step-by-step explanation: