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Sergeu [11.5K]
3 years ago
7

A certain bacteria population increases continuously at a rate proportional to its current number. The initial population of the

bacteria is 70. The population increases to 360 bacteria in 4 hours. Approximately how many bacteria are there in 7 hours? Round your answer to the nearest whole number.

Mathematics
2 answers:
masha68 [24]3 years ago
8 0

Answer:

C

Step-by-step explanation:

B = 70 × r^t

360 = 70 × r⁴

r⁴ = 36/7

4lnr = ln(36/7)

lnr = 0.4094021974

r = e^0.4094021974

r = 1.505917275

At t = 7,

B = 70 × (1.505917275)⁷

B = 1229.435775

Approximately 1229

luda_lava [24]3 years ago
3 0

Answer: C

Step-by-step explanation:

This describes an expotential function

At t = 0, P = 70

Therefore, C = 70

P = 70 e^kt

Solve for k by plugging in (4,360)

k = 0.4094

plug in t(7 hours)

70 e^(0.4094*7)

The answer roughly equals C

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-----------------------------------------------------------
Answer : 7y + 9x + 5 = 0
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