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MArishka [77]
3 years ago
11

49 is 70 of what number is sopost to be here

Mathematics
2 answers:
castortr0y [4]3 years ago
6 0
The answer is 70% if your trying to find the percentage if your trying to fing the of it will be 70 also
cricket20 [7]3 years ago
6 0
70% of a number is 49
70%    ×      n      =   49
70% = \frac{70}{100} = 0.7
0.7 × n = 49
Divide by 0.7 on either sides to isolate n
\frac{0.7n}{0.7} = \frac{49}{0.7}
0.7 and 0.7 cancels out
n = 70

49 is 70% of 70
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x = 4.363636...

Step-by-step explanation:

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Answer: \bold{a)\ P(t)=P_o\cdot e^{t\cdot ln(2.7)}}

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<u>Step-by-step explanation:</u>

P(t) = P_o\cdot e^{kt}\\\\\bullet \text{P(t) is the number of bacteria after t hours} \\\bullet P_o\text{ is the initial number of bacteria}\\\bullet \text{k is the rate of growth}\\\bullet \text{t is the time (in hours)}\\\\\\270=100\cdot e^{k(1)}\\2.7=e^k\\ln\ 2.7=\ln e^k\\\boxed{ln\ 2.7=k}\\\\\text{So the equation to find the number of bacteria is: }\boxed{P(t)=P_o\cdot e^{t\cdot ln(2.7)}}\\\\\\P(4)=100\cdot e^{4\cdot ln(2.7)}\\.\qquad =\boxed{5314}

10,000=100\cdot e^{t\cdot ln(2.7)}\\100=e^{t\cdot ln(2.7)}\\ln\ 100=ln\ e^{t\cdot ln(2.7)}\\ln\ 100=t\cdot ln(2.7)\\\dfrac{ln\ 100}{ln\ 2.7}=t\\\\\boxed{4.6=t}

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Answer:

Step-by-step explanation:

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