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Masja [62]
3 years ago
12

Please hurry; The number of bacteria in a culture grows exponentially. It can be modeled with the function f(x) = 20 (2^x).

Mathematics
1 answer:
Amiraneli [1.4K]3 years ago
8 0

Answer:

D.

Step-by-step explanation:

20(2^6) = 1280

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Inequality task :<br> -3(x+2)&gt;-69-12x
lys-0071 [83]

Answer:

-7 > x

Step-by-step explanation:

first we expand the brackets so it will be -3x -6>-69-12x

then we can convert the > to = so it will be :

-3x -6=-69-12x

we can now try to solve the equation for x so :

-3x -6= -69-12x

-6 = -69-9x

63 =-9x

7 = -x

-7 = x

we can then change the symbols back so it will be:

-7 > x

7 0
3 years ago
When I see an equation with parentheses, I need to use the Distributive Property.
Doss [256]
The answer is True, trust me on this one
7 0
2 years ago
PLZ HELP ME ASAP PLZ PLZ PLZ!!!!! I NEED LOTS OF HELP!!! I USED 40 POINTS
cupoosta [38]
First, some defintions
reciprocals are like a/b and b/a or 5/1 and 1/5

remember, \frac{\frac{a}{b}}{\frac{c}{d}}=(\frac{a}{b})(\frac{d}{c})=\frac{ad}{bc}

john's fraction is reciprocal of sarah's
john=a/b
sarah=b/a

david multiplies his by sarah and gets 12/35
(b/a)(david)=12/35

multplies his number by john and gets 12/35
(a/b)(david)=15/7

hmmm

(b/a)(david)=12/35 and
(a/b)(david)=15/7

if we divide them then we do
\frac{(\frac{b}{a})(david)}{(\frac{a}{b})(david)}=\frac{\frac{12}{35}}{\frac{15}{7}}=
\frac{\frac{b}{a}}{\frac{a}{b}}=\frac{\frac{12}{35}}{\frac{15}{7}}=
(\frac{b}{a})(\frac{b}{a})=(\frac{12}{35})(\frac{7}{15})=
\frac{b^2}{a^2}=\frac{84}{525}=
\frac{b^2}{a^2}=\frac{4}{25}
square root both sides
\frac{b}{a}=\frac{2}{5}

therefor
b=2 and a=5

john's number is a/b=5/2
sarah's number is 2/5

david, hmm

sarah times david=12/35
2/5 times david=12/35
times both sides by 5/2
david=60/70
david=6/7

check other

john times david=15/7
5/2 times 6/7=15/7
30/14=15/7
15/7=15/7
true





sarah's favorite number is 2/5
john's favorite number is 5/2
david's favorite number is 6/7
6 0
3 years ago
Find the sum of the arithmetic sequence.<br><br> -10, -7, -4, -1, 2, 5, 8
Lesechka [4]

Answer:

+3 every time or the total?

Or is it 18? U specify which

7 0
3 years ago
Which equation is equivalent to logx36=2
coldgirl [10]

Answer:

Which equation is equivalent to logx36=2

Exact Form:

x=10\frac{1}{18}

Decimal Form:

x=1.13646366

8 0
3 years ago
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