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3 years ago

10

In a laboratory The Count of bacteria in a certain experiment was increasing at the rate of 2.5 % per hour find the bacteria at

the end of 2 hours if the count wasn't really 5,06,000.

1 answer:

lesantik [10]3 years ago

3 0

Answer:

Прости я не понямайу по англискем

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How to do number 17.

NikAS [45]

(x^6 - 4x^5 - 7x^3)/2x^3=x^3(x^3-4x^2-7)/2x^3= (x^3-4x^2-7)/2

6 0

3 years ago

Angelique draws triangle GHK. If A.1.2 or 5.7<br> B.2.2 or 4.7<br> C.4.7<br> D.5.7

makvit [3.9K]

The correct question in the attached figure

we know that

applying the law of sines
g/sinG=k/sinK

g=3 units
G=30°
k=4 units
K=?
so
g/sinG=k/sinK------> g*sinK=k*sinG-----> sinK=k*sinG/g
sinK=4*sin 30°/3-----> 2/3
K=arc sin(2/3)-------> K=41.81°

case 1)
for angle K=41.81°
the sum of the angles (H +G+K)=180°
H=180-(G+K)------> 180-(30+41.81)--------> H=108.19°

h/sinH=g/sinG-------> h=g*sinH/sinG------> h=3*sin 108.19°/sin 30°
h=5.70 units

case 2)
for angle K=180°-41.81°---------> K=138.19°
the sum of the angles (H +G+K)=180°
H=180-(G+K)------> 180-(30+138.19)--------> H=11.81°

h/sinH=g/sinG-------> h=g*sinH/sinG------> h=3*sin 11.81°/sin 30°
h=1.2 units

therefore

the answer is the option
<span>A. 1.2 or 5.7</span>

7 0

3 years ago

Read 2 more answers

Please help me, I really would appreciate it. I am struggling with this.

AnnZ [28]

2)

let's say the number is "a".

"two more than the number" ----> a + 2

"five times more than that" -----> 5 * (a + 2) ---> 5(a + 2)

"the sum of that number and 5 times the number more than 2"

a + 5(a + 2)

"is 26 more than four times the number" ----> = 4*a + 26 ---> = 4a + 26

a + 5(a + 2) = 4a + 26

$\bf a+5(a+2)=4a+26\implies a+5a+10=4a+26
\\\\\\
6a-4a=26-10\implies 2a=16\implies a=\cfrac{16}{2}\implies \boxed{a=8}$

3)

"eight times the number" ---> 8 * a, or 8a

"3 less than that" ----> 8a - 3

"the number increased by 1" ---> a + 1

"16 times that" ---> 16(a + 1)

"half that" ----> [ 16(a + 1) ] / 2

$\bf 8a-3=\cfrac{16(a+1)}{2}\implies 2(8a-3)=16(a+1)
\\\\\\
16a-6=16a+16\implies \underline{16a-16a}-6=16\implies \stackrel{\textit{inconsistent system}}{-6\ne 16}$

4)

$\bf \begin{cases}
y=5x+1\\
y-2x-1
\end{cases}\qquad 5x+1=2x-1\implies 5x-2x=-1-1
\\\\\\
3x=-2\implies x=-\cfrac{2}{3}$

5)

notice each equation, they're both in slope-intercept form, y = mx + b.

now, notice their slope, is the same for both, notice their y-intercept, it varies.

same slope, different y-intercept simply means, the lines are parallel.

3 0

3 years ago

Please, please help me as soon as possible. I will mark Brainliest! :(

yaroslaw [1]

It is very likely that the second ball will red cause there is more red balls in the bag than blue and green balls.

5 0

4 years ago

Let x be a continuous random variable over [a,b] with probability density function f. Then the median of the x-values is that

natulia [17]

Answer:

The answer is " $\int e^{ax}\ dx=\frac{e^{ax}}{a}+c$ ".

Step-by-step explanation:

Please find the complete question in the attached file.

$\int^{m}_{a}\ f(x)\ dx=\frac{1}{2}\\\\f(x)=ke^{-kx}, \ [0, \infty]\\\\$

let m is the median

$so,\\\\ \int^{m}_{a}\ f(x)\ dx=\frac{1}{2}\\\\\to \int^m_0 k\cdot e^{-kx}=\frac{1}{2}\\\\\to [\frac{k\cdot e^{-kx}}{-k}]^m_0=\frac{1}{2}\\\\\to [- e^{-kx}]^m_0=\frac{1}{2}\\\\\to - e^{-km} +1=\frac{1}{2}\\\\\to e^{-km} =\frac{1}{2}\\\\\to e^{km} =2\\\\\to \ln(e^{km}) =\ln 2\\\\\to km= \ln \ 2\\\\\to m=\frac{\ln \ 2}{k}\\\\ \text{the answer is: } \\\\ \to \int e^{ax}\ dx=\frac{e^{ax}}{a}+c$

3 0

3 years ago