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Nady [450]
3 years ago
13

A U.S. nickel has a mass of 5.00 grams. A U.S. penny has a mass of 2.50 grams. What is the mass in kilograms of the coins in a b

ag containing 186 nickels and 72 pennies?
Mathematics
1 answer:
swat323 years ago
8 0
186 nickels x 5 grams = 930 grams
72 pennies x 2.50 grams = 180 grams
930 + 180 = 1,110
1 kilogram and 110 grams
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What is the factors of 2x + 4
ra1l [238]

Answer:

2(x+2)

Step-by-step explanation:

1) 2 : the greatest common factor

2) 2x+4

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Hope that helps

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What is 1.9961 x 10^-7
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4 years ago
The amount Cami raised during last year’s charity walk, $45.50, is StartFraction 7 over 10 EndFraction of the amount she raised
barxatty [35]

Answer:

The equation is given by:

n = \frac{7}{10} \times 45.50

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During last years's charity walk, she raised $45.50.

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n = \frac{7}{10} \times 45.50

3 0
3 years ago
Consider the function f given by f(x)=x*(e^(-x^2)) for all real numbers x.
NISA [10]

Answer:

\frac{\sqrt{\pi}}{4}

Step-by-step explanation:

You are going to integrate the following function:

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furthermore, you know that:

\int_0^{\infty}e^{-x^2}=\frac{\sqrt{\pi}}{2}

lets call to this integral, the integral Io.

for a general form of I you have In:

I_n=\int_0^{\infty}x^ne^{-ax^2}dx

furthermore you use the fact that:

I_n=-\frac{\partial I_{n-2}}{\partial a}

by using this last expression in an iterative way you obtain the following:

\int_0^{\infty}x^{2s}e^{-ax^2}dx=\frac{(2s-1)!!}{2^{s+1}a^s}\sqrt{\frac{\pi}{a}} (2)

with n=2s a even number

for s=1 you have n=2, that is, the function g(x). By using the equation (2) (with a = 1) you finally obtain:

\int_0^{\infty}x^2e^{-x^2}dx=\frac{(2(1)-1)!}{2^{1+1}(1^1)}\sqrt{\pi}=\frac{\sqrt{\pi}}{4}

5 0
3 years ago
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