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ryzh [129]
3 years ago
13

You are 6 feet tall and cast a 10 foot shadow. At the same time of day, your friend

Mathematics
1 answer:
IgorLugansk [536]3 years ago
3 0

Answer: The friend would be 5ft tall! <3

Step-by-step explanation:

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Find the average value of f over region
SVETLANKA909090 [29]
D is a right triangle with base length 1 and height 8, so the area of D is \dfrac12(1)(8)=4.

The average value of f(x,y) over D is given by the ratio

\dfrac{\displaystyle\iint_Df(x,y)\,\mathrm dA}{\displaystyle\iint_D\mathrm dA}

The denominator is just the area of D, which we already know. The average value is then simplified to

\displaystyle\frac74\iint_Dxy\,\mathrm dA

In the x,y-plane, we can describe the region D as all points (x,y) that lie between the lines y=0 and y=8x (the lines which coincide with the triangle's base and hypotenuse, respectively), taking 0\le x\le1. So, the integral is given by, and evaluates to,

\displaystyle\frac74\int_{x=0}^{x=1}\int_{y=0}^{y=8x}xy\,\mathrm dy\,\mathrm dx=\frac78\int_{x=0}^{x=1}xy^2\bigg|_{y=0}^{y=8x}\,\mathrm dx
=\displaystyle56\int_{x=0}^{x=1}x^3\,\mathrm dx
=14x^4\bigg|_{x=0}^{x=1}
=14
3 0
3 years ago
On a coordinate plane, a line goes through (0, 0) and (2, negative 2).
lyudmila [28]

Answer:

the answer is (-2,2)

Step-by-step explanation:

7 0
4 years ago
Read 2 more answers
Solve the equation 7x-c=k for x
Vlad1618 [11]

Answer:

x=k+c over 7

Step-by-step explanation:

7x-c+c=k+c

7x=k+c

divide both sides by 7

4 0
3 years ago
The points A,B,C and D lie in a straight line.
sattari [20]
If we had AB: BC: CD, we could easily have solved that problem. In order to combine these ratios, we need to have the same number for BC. We can create this number by finding LCM (Least Common Multiple) for 5 and 3, which is 15. Then, we can write ratios of AB:BC = 6:15 and BC:CD=15:20. Now, we can easily combine these ratios. AB:BC:CD = 6:15:20. Then, 6k+15k+20k = 82 and k=2 cm. And BC = 30 cm
5 0
3 years ago
8. Don made deposits of $500 at the end of each year for eight years. The rate is 8% compounded annually. Using the tables found
Sonbull [250]

Answer:

Step-by-step explanation:

P = $ 500 ;r =8% ;  n= 8

A = P* (1+r/100)^n

A= 500 * ( 1 + 8/100)⁸

= 500 * ( 1 + 0.08)⁸  = 500 * 1.08⁸

=500*1.85

= $ 925.45

5 0
3 years ago
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