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pashok25 [27]
3 years ago
12

You have decided to hire your little brother to clean your room for the next month. as payment, you will give him 1 penny the fi

rst day, 2 pennies the second day, 4 pennies on the third day, and so on giving him twice as many pennies each day as you gave him the day before. if there are 30 days in the month, how much total money will you pay him for his work?
Mathematics
1 answer:
Dafna11 [192]3 years ago
6 0
1, 2, 4, 8, 16 ...

a = 1

d = 8/4 = 2

Sn = n/2(2a + (n-1)d) = 30(2 + (29×2)) = 30(60) = 1800

Ans = $1,800 ...//
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a standard 35-mm movie projects 24 images each second. at this rate, how many images are necessary for a 1.5 hour movie ?
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Hope this helps!
Have a nice day :)
-fart2fart
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3 years ago
If a polynomial function f(x) has roots –8, 1, and 6i, what must also be a root of f(x)? A. –6
anyanavicka [17]

Answer:

-6i

Step-by-step explanation:

Complex roots always come in pairs, and those pairs are made up of a positive and a negative version. If 6i is a root, then its negative value, -6i, is also a root.

If you want to know the reasoning, it's along these lines: to even get a complex/imaginary root, we take the square root of a negative value. When you take the square root of any value, your answer is always "plus or minus" whatever the value is. The same thing holds for complex roots. In this case, the polynomial function likely factored to f(x) = (x+8)(x-1)(x^2+36). To solve that equation, you set every factor equal to zero and solve for the x's.

x + 8 = 0

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x = 1

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x^2 = -36 ... take the square root of both sides to get x alone

x = √-36 ... square root of an imaginary number produces the usual square root and an "i"

x = ±6i

6 0
3 years ago
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10 5+4 is 9 so it would be 10
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