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defon
3 years ago
15

Evaluate the function f(x)=4•7^x for x=-1 and x2 show your work

Mathematics
1 answer:
boyakko [2]3 years ago
3 0
When you evaluate the function f (x) = 4 • 7 ^ x for x = -1 you get:
 f (-1) = 4 * 7 ^ -1
 f(-1) = 4* 1/7
 f (-1) = 0.5714
 The next part of the question is not clear. If it refers to the function at x = 2 then:
 f (2) = 4 * 7 ^ (2)
 f(2) =4*49
 f (2) = 196
 If it refers to it in x ^ 2
 f (x ^ 2) = 4 * 7 ^ (x ^ 2)
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Each train car holds 71 passengers. About how many train cars
gulaghasi [49]

567/71 because passengers/(train cars/passengers) = train cars

71 x 7 = 497 (not enough)

71 x 8 = 568 (enough)

Answer: 8 train cars

7 0
2 years ago
In Miami, the number of highway accidents increased by 20% over a four year period. How many accidents were there in 2013 if the
scZoUnD [109]

Answer:

Step-by-step explanation:

20/100 * 5,120 = 1024

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5 0
3 years ago
A triangle has an area of 36 square feet. If the height of the triangle is 6 more feet than its base, what is its height and bas
andriy [413]
If b is the base then the height h=b+6. As we have S=bh/2 then
36=b(b+6)/2;
b²+6b-72=0;
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b₁=-3-9=-12
b₂=-3+9=6.
The base is always positive so b=6, h=6+6=12.
Answer: base=6 ft, height=12 ft.

7 0
3 years ago
IM having trouble trying to solve this problem
Assoli18 [71]

Answer:

You would have approximately 201 insects.

Step-by-step explanation:

To calculate the final population of the insects, you need to first insert the values of each variable you know into the equation. The initial population at time t=0 would be 100 insects, the rate of population growth coverted to decimal form would be 0.1, and the elapsed time since time t=0 is 7 days. Now the new equation would be P = 100(e)^{0.1*7}.

   P = 100(e)^{0.1*7}

⇒ P ≈ 100 * 2.01

⇒ P ≈ 201

You will have 201 insects in 7 days (rounded to the nearest insect).

3 0
3 years ago
Read 2 more answers
Please answer correctly
9966 [12]

Answer:

c

Step-by-step explanation:

6 0
3 years ago
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