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Feliz [49]
3 years ago
12

Plzzzz help me!!!

Mathematics
1 answer:
Hoochie [10]3 years ago
6 0

Answer:

49.95+2.4975(the 5% tax)

Step-by-step explanation:

=52.4475 dollars

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Anyone good with math??
-Dominant- [34]
Yup! We're all pretty good here.
7 0
3 years ago
Find the largest prime divisor of 76^2 − 1.
saveliy_v [14]

Answer:

11

Step-by-step explanation:

This is a difference of squares and therefore can be written as (76-1)(76+1)=(75)(77).

So lets look at the factors....

75=3(25)=3(5)(5)

77=7(11)

The biggest prime factor is therefore 11.

Identities used:

Difference of squares a^2-b^2=(a-b)(a+b)

3 0
3 years ago
20 subtracted from 6 times a certain number, the result is 94. what is the number?
tino4ka555 [31]
Let the number be x.
6x-20=94
6x=114
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3 0
3 years ago
Read 2 more answers
How many students got eight or more answers correct?
slamgirl [31]

Answer:

9

Step-by-step explanation:

You have to count the number of dots there are after the number 8. (This includes the dotes above 8.)

7 0
3 years ago
Read 2 more answers
A colony of bacteria is grown under ideal conditions in a laboratory so that the population increases exponentially with time. A
Naddik [55]

Answer:

Initial bacterias = 6006000

Altought I believe is safe to assume that the values were 192,000 and 384,000 instead of 192,192,000 and 384,384,000, in that case the initial bacterias is 6000

Step-by-step explanation:

A exponential growth follows this formula:

Bacterias  = C*rⁿ

C the initial amount

r the growth rate

n the number of time intervals

Bacterias (55 hours) = 192,192,000

Bacterias (66 hours) = 384,384,000

Bacterias(55hours)=C*r^{{\frac{55-t}{t}}} \\Bacterias (66hours) = C*r^{\frac{66-t}{t}}}

If you divide both you can get the growth rate:

\frac{Bacterias (66hours)}{Bacterias(55hours)}=\frac{C*r^{\frac{66-t}{t}}}{C*r^{{\frac{55-t}{t}}}} \\\frac{384,384,000}{192,192,000} =r^{\frac{66-t}{t} -\frac{55-t}{t} } \\2 =r^{\frac{11}{t}}

So with that r = 2 and each time interval correspond to 11 years

Then replacing in one you can get the initial amount of C

Bacterias (55hours)=C*2^{\frac{55-11}{11} } 192,192,000 = C*32\\C= 6006000

7 0
3 years ago
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