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MrMuchimi
3 years ago
13

The function f(x)=125(0.9)x models the population of a species of fly in millions after x years.

Mathematics
2 answers:
SSSSS [86.1K]3 years ago
6 0
A word to the wise:  It's  <span> f(x)=125(0.9)^x,   where ^ represents exponentiation.

In this case the ave. value over the interval [11, 15] is

 125(0.9)^15 - 125(0.9)^11
------------------------------------- = (125/4) [ 0.9^15 - 0.9^11)
               15 - 11                    =  (31.25) [ 0.2059 - 0.3138 ] = a negative result
                                              =  (31.25)(-0.1079) = -3.372  (av. r. of c.
                                                     over the interval [11,15] )

Do the same thing for the time interval [1,5].  Then compare the two rates of change.</span>
katovenus [111]3 years ago
5 0

Just took the test, the answer was "A) The average rate of change between years 11 and 15 is about \frac{1}{3} the rate between years 1 and 5."

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A smart phone regularly sells for $180.00 but is on sale for 30% off. What is the amount of the discount?
pantera1 [17]

Answer:

$54

Step-by-step explanation:

The amount of the discount can be found by multiplying 180 by 0.3 which is 54.

If you also need to know the new total it would be $126 because

180 - 54 = 126

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mote1985 [20]

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5a + 5b

Step-by-step explanation:

a(5 + b) = 5a + 5b

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Slav-nsk [51]
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3 years ago
Is the answer 2 to this question?
iragen [17]

Answer:

its 8

Step-by-step explanation:

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3 years ago
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PLZ HELP I BEEN SUCK FOE SO LONG PLZ RIGHT ANSWER I WILL CRY
mel-nik [20]

Answer:

40 students

Step-by-step explanation:

In this problem, one is given the ratio ( 8 : 3 ), since a ratio is another way of writing a fraction one can rewrite it as; \frac{8}{3} (8) represent the number of students who want to learn about magnets, and (3) represents the number of students who want to learn about magic tricks.

In the problem, it is also given that 25 more students wanted to learn about magnets compared to magic tricks. If one uses the parameter (x) to represent the factor by which the fraction \frac{8}{3} is reduced, then one can get the equation;

8x = 3x + 25

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8x

= 8(5)

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3 years ago
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