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alekssr [168]
3 years ago
14

What is the y-intercept of the quadratic y=-2x^2-4x-5 ? (-5,0) (0,-2) (-1,3) (0,-5)

Mathematics
1 answer:
Korolek [52]3 years ago
7 0
Y - intercept is f(0) then (0; m)

We have: y=-2x^2-4x-5\to f(0)=-2(0)^2-4(0)-5=-5

Answer: (0; -5)
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Five million bacteria live in an organism. The doubling period is 1.5 hours. How many will there be after:
finlep [7]
We write the generic exponential equation:
 y = A (b) ^ t
 Where,
 A: initial population
 B: growth rate
 t: time in hours.
 Substituting values we have:
 y = 5 (2) ^ ((1 / 1.5) * t)
 For t = 9 hours we have:
 y = 5 (2) ^ ((1 / 1.5) * 9)
 y = 320 million
 For t = 24 hours (one day) we have:
 y = 5 (2) ^ ((1 / 1.5) * 24)
 y = 327680 million
 For t = 2 hours we have:
 y = 5 (2) ^ ((1 / 1.5) * 2)
 y = 12.5992105 million
 Answer:
 
a) t hours?
 
y = 5 (2) ^ ((1 / 1.5) * t)
 
b) 9 hours?
 
y = 320 million
 
c) 1 day?
 
y = 327680 million
 
d) 2 hours?
 
y = 12.5992105 million
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3 years ago
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Vedmedyk [2.9K]

Answer:

3 and 21/22

Step-by-step explanation:

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Step-by-step explanation:

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