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Sergeu [11.5K]
2 years ago
9

Help I have no idea to do this!! I’m stuck!

Mathematics
2 answers:
Degger [83]2 years ago
6 0
The answer is 7
hope that helps !
marysya [2.9K]2 years ago
4 0

Answer: 7

Step-by-step explanation:

A \cap C denotes the intersection of A and C, or in other words, how many elements are shared between them.

The number of elements is 2 + 5 = 7

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The number of bacteria (b) in a batch of refrigerated food is given by the function b(t) = 20t2 − 70t + 300, where t is the temp
nata0808 [166]
We want to combine b(t) and t(h) to create a function that described the number of bacteria, b, as a function of time, h. 
This function can be called b(t(h)), or b(h).
Consider the function b(t), or bacteria as a function of temperature. 
b(t) = 20t² - 70t +300
This describes the number of bacteria, given the temperature.

t(h) described the temperature as a function of time, specifically hours after refrigeration:
t(h) = 2h + 3

Since the time h can tell us the temperature t, and the temperature t can tell us the # of bacteria b, we can create a function that tells us the number of bacteria, b, given hours following refrigeration, h.

To do this, we plug t(h) in for every t in the b(t) function:
b(t(h)) = 20 (2h+3)² - 70(2h+3) + 300
We can also call this function b(h), since we now can express b as a function of h.

Simplify the function:
b(h) = 20 (4h²+12h+9)-14h-210+300
b(h) = 80h² +100h +270

The Answer is B

7 0
3 years ago
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Question Progress
Naily [24]

Answer:

Step-by-step explanation:

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3 years ago
What isa the area of the square whoose sides mesure 3x + 4​
olga nikolaevna [1]

Answer:

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Step-by-step explanation:

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3 years ago
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Sati [7]

Answer:

12

Step-by-step explanation:

square root of 8 = 2.82842712475

square root of 18 = 4.24264068712

4.24264068712 × 2.82842712475 = 12

4 0
3 years ago
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